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		<title>explain xkcd - User contributions [en]</title>
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		<updated>2026-04-13T03:54:40Z</updated>
		<subtitle>User contributions</subtitle>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:3137:_Cursed_Number&amp;diff=385922</id>
		<title>Talk:3137: Cursed Number</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:3137:_Cursed_Number&amp;diff=385922"/>
				<updated>2025-09-04T10:25:43Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!-- Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom. --&amp;gt;&lt;br /&gt;
Warning! Do not read! 421827639108237885847650045004 --[[User:Darth Vader|Darth Vader]] ([[User talk:Darth Vader|talk]]) 22:00, 3 September 2025 (UTC)&lt;br /&gt;
:Oh no, too late! bdbdbalasdfsdfoiubtasdf [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 22:35, 3 September 2025 (UTC)&lt;br /&gt;
::Well, at least you knew that reading the string &amp;quot;bdbdbalasdfsdfoiubtasdf&amp;quot; was the only antidote! [[Special:Contributions/92.17.62.87|92.17.62.87]] 23:35, 3 September 2025 (UTC)&lt;br /&gt;
:::Maybe it's safe if you read it scientifically? ~4.218276391088547650045x10&amp;lt;sup&amp;gt;29&amp;lt;/sup&amp;gt;?--'''''[[User:DollarStoreBa'al|&amp;lt;span style=&amp;quot;color:#023020&amp;quot;&amp;gt;DollarStoreBa'al&amp;lt;/span&amp;gt;]]&amp;lt;sup&amp;gt;[[User_talk:DollarStoreBa'al|&amp;lt;span style=&amp;quot;color:#000080&amp;quot;&amp;gt;'''''converse'''''&amp;lt;/span&amp;gt;]]&amp;lt;/sup&amp;gt; 23:43, 3 September 2025 (UTC)&lt;br /&gt;
:::Edit: NOPE NOPE NOPE NOPE NOPE NOPE NOPE NOPE NOPE --'''''[[User:DollarStoreBa'al|&amp;lt;span style=&amp;quot;color:#023020&amp;quot;&amp;gt;DollarStoreBa'al&amp;lt;/span&amp;gt;]]&amp;lt;sup&amp;gt;[[User_talk:DollarStoreBa'al|&amp;lt;span style=&amp;quot;color:#000080&amp;quot;&amp;gt;'''''converse'''''&amp;lt;/span&amp;gt;]]&amp;lt;/sup&amp;gt; 23:44, 3 September 2025 (UTC)&lt;br /&gt;
&lt;br /&gt;
Not pictured - an MTF team breaking into the compound and abducting the original authors while clean-up arrives with amnestics.&lt;br /&gt;
&lt;br /&gt;
Wenn ist das Nunstruck git und Slotermeyer? [[Special:Contributions/76.209.228.203|76.209.228.203]] 23:50, 3 September 2025 (UTC)&lt;br /&gt;
: I'm a German. You &amp;lt;snicker&amp;gt; did this on purpose &amp;lt;guffaw&amp;gt; right? AHAHAHAHAHAHAAAAAAAAAAAA [[Special:Contributions/2A02:2455:1960:4000:6CFB:CAF1:B89F:C57E|2A02:2455:1960:4000:6CFB:CAF1:B89F:C57E]] 09:00, 4 September 2025 (UTC)&lt;br /&gt;
&lt;br /&gt;
This comic is the best comic in a while [[User:Mathmaster|Mathmaster]] ([[User talk:Mathmaster|talk]])&lt;br /&gt;
&lt;br /&gt;
[https://en.wikipedia.org/wiki/Pentium_FDIV_bug Pentium FDIV Bug] is a math error when handling specific rarely-encountered numbers. {footnote: over 30 years ago!!} No FDIV deaths are reported, but we might not know. --[[User:PRR|PRR]] ([[User talk:PRR|talk]]) 00:20, 4 September 2025 (UTC)&lt;br /&gt;
* ahaha 0.1+0.2 goes brrt (e.g. = 0,30000000000000004) [[Special:Contributions/81.89.66.133|81.89.66.133]] 08:54, 4 September 2025 (UTC)&lt;br /&gt;
&lt;br /&gt;
I have a different interpretation of this comic than the one in the explanation. See, I think it makes more sense that due to the infinite nature of numbers, it can be said that there may exist one that happens to be a severe cognitohazard, rather than there certainly being one such number in the comic's universe. [[User:HoneyBadger|HoneyBadger]] ([[User talk:HoneyBadger|talk]]) 01:55, 4 September 2025 (UTC)&lt;br /&gt;
&lt;br /&gt;
I found this number years ago, while reading a hexadecimal dump of an image file, and yes, it is just as potent, possibly more so, in hexadecimal. Want to know what it is? It starts (in hex of course) DEADFACEABEDEFACEDAFADEDBADBEADEDBEDAD before going off into more ‘normal’ digits. [[Special:Contributions/2607:FB90:8B1D:C283:21DE:C9A5:72EB:C044|2607:FB90:8B1D:C283:21DE:C9A5:72EB:C044]] 03:42, 4 September 2025 (UTC)&lt;br /&gt;
* Oh, magic numbers. What about a ''0x31124837h'' pointer? &amp;lt;!-- it reads as 0xELIZABETh!--&amp;gt; [[Special:Contributions/81.89.66.133|81.89.66.133]] 08:54, 4 September 2025 (UTC)&lt;br /&gt;
&lt;br /&gt;
SCP nerd here, I think the article should link to a different SCP. SCP-033 isn't really a good example of a cognitohazard, since it affects written/digital storage, not the mind/brain. [https://scp-wiki.wikidot.com/scp-012 SCP-012] for example would be a closer fit. (CW: somewhat graphic self harm) --[[User:Muno|Muno]] ([[User talk:Muno|talk]]) 04:45, 4 September 2025 (UTC)&lt;br /&gt;
&lt;br /&gt;
If one supposes that reading the cursed number inside another number is also bad, then for you to have at most a 1/2 chance of reading it in a string of numbers with the bounds given in the comic, you would have to read 1.8*10^21 digits strung together [[User:TheTrainsKid|TheTrainsKid]] ([[User talk:TheTrainsKid|talk]]) 05:15, 4 September 2025 (UTC)&lt;br /&gt;
:Taking an average reading speed of 40 digits per second, that would take the reader a trillion years.&lt;br /&gt;
[[Special:Contributions/46.144.8.194|46.144.8.194]] 07:25, 4 September 2025 (UTC)&lt;br /&gt;
* Good. Trillion years divided by 9 billion people still gives 111.(1) years of non-stop reading. [[Special:Contributions/81.89.66.133|81.89.66.133]] 08:55, 4 September 2025 (UTC)&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3093:_Drafting&amp;diff=383180</id>
		<title>3093: Drafting</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3093:_Drafting&amp;diff=383180"/>
				<updated>2025-08-04T11:03:15Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3093&lt;br /&gt;
| date      = May 23, 2025&lt;br /&gt;
| title     = Drafting&lt;br /&gt;
| image     = drafting_2x.png&lt;br /&gt;
| imagesize = 317x518px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = A 5% efficiency gain at the cost of a 99% efficiency loss&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This is another one of [[Randall|Randall's]] [[:Category: Tips|Tips]], this time an aerospace tip. In aerodynamics, {{w|Drafting (aerodynamics)|drafting}} is an aerodynamic technique where one moving object follows another one closely to reduce drag by using the first objects {{w|slipstream}}. It is used in various sports, most prominently {{w|cycling}}, specifically {{w|mass start}} {{w|Road bicycle racing#Drafting|road racing}} or some {{w|track cycling}} events. Also in motorsports, before the invention of high {{w|downforce}} drafting was {{w|1971 Italian Grand Prix|quite important}}. On normal roads drafting can be used by trucks looking to save fuel. While this can give an aerodynamic advantage to both follower and followed if done right, in some cases the disturbances in airflow can actually reduce efficiency. It can also create significant danger of collision if the one being followed has to suddenly manoeuvre or reduce speed.&lt;br /&gt;
&lt;br /&gt;
The comic explores the idea of using drafting for rockets and states that, while it theoretically works, it isn't really recommended. The title text gives more details on this, claiming that although there is an efficiency gain of 5% through drafting via the general mechanism, it also comes with a 99% loss. Trying to closely follow a rocket, directly against the flow of its extremely hot and high-speed exhaust, could have adverse effects on the follower's flight and structural integrity. There might also be a risk to the leader, if the follower collides with it or if the follower explodes.&lt;br /&gt;
&lt;br /&gt;
Generally, this could be understood because land transportation is based on traction (pulling yourself along a surface via friction). At higher speeds (above 60km/h), the dominant force becomes wind drag. {{w|Energy-efficient driving}} at these higher speeds can be improved by drafting behind another vehicle. This doesn't apply to rockets because they do not move themselves via friction but rather via Newton's third law (throwing stuff backwards). This means that the front rocket would just push the back rocket against its own thrust (among other bad effects).&lt;br /&gt;
&lt;br /&gt;
It should be mentioned that drafting behind another land vehicle in regular traffic is a potentially lethal high-risk endeavour, as the truck in front of you may suddenly have to brake for one reason or another, and human reaction times are generally too long to rely upon when you're close enough for this method to have any significant effect. Rockets do not suddenly brake in mid-flight,{{Citation needed}} so this may be said in their favour as leading vehicles — that is of course, if you feel that blowing up in a spectacular fireball is preferable to being violently crushed into a metal pancake. In [[Simple Writer|simpler terms]], if you do this [[1133: Up Goer Five|you will have a bad problem and you will not go to space today, or maybe ever]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A rocket with two boosters is launching going towards the top right corner. It has a two-stage core and two boosters, and they produce three flames from their exhaust and beneath these flames is a large exhaust plume fanning out behind the rocket most of the way towards the bottom of the panel. A smaller rocket is following the first rocket. It is very close to the first rocket, so most of the smaller rocket is inside the exhaust plume from the larger rocket. The smaller rocket does not have boosters, but still produces three smaller flames from its exhaust. Beneath these flames the smaller rocket also leaves a large but slimmer exhaust plume that exits the panel at the bottom left corner.]&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Aerospace tip: Although the technique reduces atmospheric drag for many types of vehicles, you should '''''never''''' try to improve rocket launch efficiency through drafting.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:Tips]]&lt;br /&gt;
[[Category:Rockets]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3113:_Fix_This_Sign&amp;diff=383157</id>
		<title>3113: Fix This Sign</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3113:_Fix_This_Sign&amp;diff=383157"/>
				<updated>2025-08-03T12:17:47Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3113&lt;br /&gt;
| date      = July 9, 2025&lt;br /&gt;
| title     = Fix This Sign&lt;br /&gt;
| image     = fix_this_sign_2x.png&lt;br /&gt;
| imagesize = 448x405px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = We're building on our earlier success getting web developers to pay to change the backslashes in our displayed payment URL to forward slashes.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
[[Randall Munroe|Randall]] has created a sign with a number of issues, such as bad kerning and alignment, that {{w|graphic designer}}s might be disturbed by. Fortunately these graphic designers can donate money to have the sign's issues fixed (which is possibly an improvement upon the situation invoked in the case of [[2598: Graphic Designers]]). [[2008: Irony Definition|Ironically]], once all the errors are fixed, the sign won't make sense any more, requesting money for fixes that have already been made. &lt;br /&gt;
&lt;br /&gt;
The relative values assigned to each 'fix' are presumably proportional to at least one observer's perceived degree of issue with each 'mistake'. Given the costs of printing a sign of this size, Randall may have severely underpriced his fixes and set up his business to fail, if he intends to honour the pledges. He may be relying on there being a ''lot'' of passing graphic designers, generating multiple 'doanations' for each issue. Perhaps he will only fix them if a certain total amount of money is raised. This would be similar to the {{w|Kickstarter}} model, where people can donate at different levels and multiple people can donate at the same level, but the project will only be undertaken if a certain total amount of money is raised. If that total is not raised, nobody gets charged and the project is cancelled. One would hope the QR code would lead to a page detailing whether that's the case, what the total amount raised would need to be to be worth undertaking the fixes, or otherwise explaining how the &amp;lt;s&amp;gt;scam&amp;lt;/s&amp;gt; project works. The following paid solutions to deliberate issues are advertised:&lt;br /&gt;
&lt;br /&gt;
;Fix kerning ($10) :{{w|Kerning}} refers to the spacing between letters in a {{w|typeface}}, previously addressed in [[1015: Kerning]]. Kerning issues can result in letters in text appearing too far apart, as if there were a space in between, or too close, as if the letters were merged. In some instances, combinations of letters can appear like other letters. A well known example of this is the r and n merging into an m. (For example, &amp;quot;kerning&amp;quot; might appear as &amp;quot;keming&amp;quot;, which is hinted at in the comic with the R and N close together, although here they are in uppercase, so this merging doesn't happen.)&lt;br /&gt;
:In this instance, the N and I in this word are very close together in this actual item, as a self-demonstrating issue. In the sign's title, the I and S (in &amp;quot;THIS&amp;quot;) are too far apart and the S and the I (in &amp;quot;SIGN&amp;quot;) are too close to each other. &amp;lt;!-- Due to the nature of the hand-written letters, this may or may not even be the exact extent of Randall's intended kerning errors, or the some total of everything that everyone sees as an error, given that we're primed to see such problems. --&amp;gt;&amp;lt;!-- If you're trying to use 'some total' to extort editors, I feel obliged to point out that that won't work on a wiki --&amp;gt;&lt;br /&gt;
&lt;br /&gt;
;Align columns ($20) :Here the dollar amount and the text itself do not {{w|typographic alignment|align}} in columns with the other entries, which disrupts the flow of the eye down the list, making it harder to read.&lt;br /&gt;
&lt;br /&gt;
;Fix text size ($20) :The {{w|Point_(typography)|size}} of this entry is smaller than the rest of the other entries. As with the misaligned columns, such variances could be displeasing to the eye or distracting.&lt;br /&gt;
&lt;br /&gt;
;Fix typo ($50) :The title of the sign says &amp;quot;'''Doanate''' to fix this sign!&amp;quot; Someone who is easily annoyed by random typos could be compelled to donate just to get the typo fixed.&lt;br /&gt;
&lt;br /&gt;
;Fix centering ($50) :The content of the sign is off-center, leaving larger gaps to the left than to the right.&lt;br /&gt;
&lt;br /&gt;
;Fix rotation  ($100): The content of the sign slopes slightly down from left to right. For example, in the title &amp;quot;doanate&amp;quot; is higher than &amp;quot;sign&amp;quot;, and the {{w|QR code}} 'graphic' is noticeably off-square.&lt;br /&gt;
&lt;br /&gt;
;Title text: The title text refers to another common annoyance in a different field: that of website developers and, specifically, weblinks. {{w|URL}}s are defined to use forward slashes (/) rather than {{w|backslash}}es (\), which are used in Windows {{w|Path_(computing)|pathnames}}. Due to the widespread usage of both URLs and Windows pathnames, it is not uncommon for someone to mistakenly use backslashes in URLs, which isn't always supported. This annoyance was also discussed in [[727: Trade Expert]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
:[A single panel containing a large, elevated sign with Ponytail standing in front of it.]&lt;br /&gt;
&lt;br /&gt;
:[Title, slightly off horizontal, more to the right than central and the character spacing is not entirely consistent/aesthetic:] &amp;lt;big&amp;gt;Doanate[sic] to fix this sign!&amp;lt;/big&amp;gt;&lt;br /&gt;
&lt;br /&gt;
:[To the left of the lower part of the sign there is an 'QR code', tilted slightly with a plaintext link beneath it:] https://[illegible].com&lt;br /&gt;
&lt;br /&gt;
:[To the right are several dollar values, in one column, and 'fixes', in a second, some of which have their own self-demonstrating quirks.]&lt;br /&gt;
::[The letters &amp;quot;R&amp;quot; and &amp;quot;N&amp;quot; may be too close together:] $10 fix kerning&lt;br /&gt;
::[Both dollar value and fix text are shifted left of their respective columns:] $20 align columns&lt;br /&gt;
::[This line is in a smaller font:] &amp;lt;small&amp;gt;$20 fix text size&amp;lt;/small&amp;gt;&lt;br /&gt;
::$50 fix typo&lt;br /&gt;
::$50 fix centering&lt;br /&gt;
::$100 fix rotation&lt;br /&gt;
&lt;br /&gt;
:[Ponytail stands looking at the sign, apparently in the process of using a smartphone:] Grrr...&lt;br /&gt;
&lt;br /&gt;
:[Caption below panel:] My new company's business model is based on extorting graphic designers.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Graphic designers]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3104:_Tukey&amp;diff=383156</id>
		<title>3104: Tukey</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3104:_Tukey&amp;diff=383156"/>
				<updated>2025-08-03T12:17:11Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3104&lt;br /&gt;
| date      = June 18, 2025&lt;br /&gt;
| title     = Tukey&lt;br /&gt;
| image     = tukey_2x.png&lt;br /&gt;
| imagesize = 392x276px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Numbers can be tricky. On the day of my 110th birthday, I'll be one day younger than John Tukey was on his.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
The comic gives a quote by {{w|John W. Tukey}}, an American mathematician and statistician, from his paper called ''The Future of {{w|Data analysis|Data Analysis}}'', where he discusses the importance of facing uncertainty. A stripped-down version of his quote could be formulated as:&lt;br /&gt;
&lt;br /&gt;
{{Quote|It is far better to have ''an approximate answer to the right question'' than ''an exact answer to the wrong question''.}}&lt;br /&gt;
&lt;br /&gt;
[[Randall]] then gives Tukey's age as 110.000 years (that is, 110 years to three decimal places) — a very precise answer to the question of &amp;quot;how old is Tukey?&amp;quot; However, when it comes to his birthday, arguably the right question in this context, he only gives the approximate answer of &amp;quot;sometime this week&amp;quot;. Tukey was born on Wednesday, June 16, 1915, 110 years and 2 days before the release of this comic on Wednesday, June 18, 2025. Since he died in 2000, it can be debated whether he has a birthday this week! &lt;br /&gt;
&lt;br /&gt;
Since the comic was two days (or 0.54% of a year) late compared to Tukey's actual birthday, three decimal places of zero is actually inaccurate on the day of the comic's release, when he was 110.005 years old. However, sometime during that week he was exactly 110.000 years old — the joke being that he gives a very precise age, but not the exact time when this answer was accurate.&lt;br /&gt;
&lt;br /&gt;
The title text states that Randall would be one day younger than Tukey would be on his 110th birthday. Tukey's 110th birthday (on Monday) marked 40,178 days since his birth. Randall's 110th birthday ([[1179: ISO 8601|2094-10-17]]) will occur 40,17'''7''' days after his birth, due to having only passed through {{w|Gregorian calendar|27 leap-days}} (the first in 1988, the latest in 2092) instead of Tukey's 28 instances (from 1916 to 2024, inclusive).&lt;br /&gt;
&lt;br /&gt;
There are multiple different definitions of the year, however. The one most applied to birthdays is &amp;quot;a whole year has passed when it's the same calendar day&amp;quot;, but the usual scientific/mathematical value is the tropical year of 365.2422 days (the time between the same two equinoxes) which smears the leap day across four years (which might impact the last digit of the calculation), and also the sidereal year of 365.2564 days (the time it takes the Sun to return to the same place in the sky), which differs due to {{w|Axial precession|precession of the equinoxes}}. The difference between the tropical and sidereal calculations over 110 years is about 1.5 days, so for this alternative definition of the year, we get a different answer for which day is 110, but it still remains &amp;quot;this week&amp;quot;. There's also the average length of a year in the {{w|Gregorian calendar}} (the calendar in use now), which averages 365.2425 days over the 400-year cycle of the calendar. Tukey suggests we shouldn't get hung up on this, but those who happen to be born on 29th February may disagree.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Text formatted as a block quote]&lt;br /&gt;
&lt;br /&gt;
:&amp;quot;Far better an approximate answer to the ''right'' question, which is often vague, than an ''exact'' answer to the wrong question, which can always be made precise.&amp;quot;&lt;br /&gt;
&lt;br /&gt;
:[Author and source towards the right of the comic below the quote]&lt;br /&gt;
&lt;br /&gt;
:John W. Tukey&lt;br /&gt;
:''The Future of Data Analysis'' (1962)&lt;br /&gt;
&lt;br /&gt;
:Caption below the comic:&lt;br /&gt;
:Happy approximate birthday to John Tukey, author of my favorite statistics quote, who was born 110.000 years ago sometime this week.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Comics featuring real people]]&lt;br /&gt;
[[Category:Statistics]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3119:_Flettner_Rotor&amp;diff=383155</id>
		<title>3119: Flettner Rotor</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3119:_Flettner_Rotor&amp;diff=383155"/>
				<updated>2025-08-03T12:14:10Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3119&lt;br /&gt;
| date      = July 23, 2025&lt;br /&gt;
| title     = Flettner Rotor&lt;br /&gt;
| image     = flettner_rotor_2x.png&lt;br /&gt;
| imagesize = 385x359px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = &amp;quot;And in maritime news, the Coast Guard is on the scene today after an apparent collision between two lighthouses.&amp;quot;&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This is another one of [[:Category:Tips|Randall’s tips]]. [[Randall]] is pointing out that a {{w|Flettner rotor}} can make a boat look like a lighthouse, and thus make other boats avoid it. A vertical-axis Flettner rotor is a smooth cylinder which is spun along its axis. As air passes across it from the side, an aerodynamic force is generated at a right angle (i.e., forward) to propel the boat in the desired direction.&lt;br /&gt;
&lt;br /&gt;
As a tall vertical cylinder, the rotor has the approximate appearance of the column of a stereotypical lighthouse. If a directional light were attached at the top, it too would spin, sending out periodic flashes of light and making it even more similar to a lighthouse. Or, as it appears to be in the comic, a fully working {{w|Lighthouse#Components|lantern house}} could be fixed to the top of the non-rotating core to the rotor, making it look even more like a lighthouse (and also allowing independent control of the light's flash rate).&lt;br /&gt;
&lt;br /&gt;
To people on a vessel directly in the path of the disguised boat, it would appear that they are sailing or drifting towards a hazard, prompting them to take action to navigate away from it, thereby clearing its course. In fact, there would be no need to have a Flettner rotor at all to achieve this effect — a simple, non-rotating column with a rotating or flashing light would do just the same thing for a boat that is powered by other means, and seems a small additional effort if you're already taking the trouble to install the fake rocks and light.&lt;br /&gt;
&lt;br /&gt;
The title text describes &amp;quot;an apparent collision between two lighthouses&amp;quot;, which could refer to two Flettnerized boats colliding with each other because they were ''both'' assuming that everyone else will give them the right of way. Alternatively, a single Flettnerized boat could complacently collide with an actual lighthouse, having similarly dismissed it as another boat that should have taken avoidance measures. This alludes to an old {{w|Lighthouse and naval vessel urban legend|urban legend}} in which a naval vessel insists that another radio operator at sea divert course to avoid a collision, demanding right of way by citing their military rank, only to be embarrassed when the other operator reveals they are not another sea vessel, but a lighthouse.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A panel showing Cueball standing on a Flettner Rotor Sailboat, which is decorated with rocks and a lighthouse-top on the Flettner Rotor.]&lt;br /&gt;
:[Text beneath panel:]&lt;br /&gt;
:Sailing tip: If you have a Flettner Rotor Sailboat, you can add some fake plastic rocks and a light to make other boats give you the right of way.&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
[[Actually|Technically]], Randall is wrong to say &amp;quot;...give you the right of way&amp;quot; - this isn't how the maritime &amp;quot;rules of the road&amp;quot; work. The other vessel could ''give way'' to the Flettner craft, but not give it '''right''' of way, as that's given by {{w|COLREGS|an international convention}} and not by individual ships. Also, one doesn't give way to lighthouses because they ''have'' right of way. There's nothing in common maritime law that explicitly says one has to give way to lighthouses. The closest thing would be the {{w|STCW|STCW convention}}, but it only uses phrases such as &amp;quot;Navigate with due care&amp;quot; and doesn't explicitly say &amp;quot;give way to lighthouses&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
To be more pedantic, under the international convention mentioned above, neither ship ever has a right of way: one ship has an obligation to give way, while the other ship has an obligation to stand-on (i.e., keep its current course and speed until the ships are past one another). If the ships collide, both are held responsible. Navigators are very clear that the &amp;quot;right of way&amp;quot; of a car doesn't apply at sea, and one always has many obligations, including obligations to give way under certain circumstances even when you're the stand-on vessel.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Tips]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3098:_Trojan_Horse&amp;diff=382843</id>
		<title>3098: Trojan Horse</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3098:_Trojan_Horse&amp;diff=382843"/>
				<updated>2025-07-30T05:02:03Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3098&lt;br /&gt;
| date      = June 4, 2025&lt;br /&gt;
| title     = Trojan Horse&lt;br /&gt;
| image     = trojan_horse_2x.png&lt;br /&gt;
| imagesize = 740x196px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Ultimately, history would imperfectly record the story of the Foal of Troy.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic presents a brief retelling of the {{w|Trojan Horse}} story, the climactic event of the legendary {{w|Trojan War}}, one of the best-known epics of ancient Greece and Rome. The retelling is a {{w|feghoot}}, set up to deliver the pun in the title text as well as a deconstruction of the story, replacing the epic elements with far more ordinary ones while keeping the tone of the tale the same.&lt;br /&gt;
&lt;br /&gt;
The premise is that the Trojan Horse story's origin is mundane. The gift to the Trojans by the (supposedly) departing Greek army, we are told, was a normal-sized, living mare, which promptly and unexpectedly dropped (i.e. gave birth to) a foal. According to the title text, this is the story of the &amp;quot;Foal of Troy&amp;quot;, which &amp;quot;history imperfectly recorded&amp;quot;. In the &amp;quot;imperfect record&amp;quot; (i.e. the {{w|Epic Cycle}} and later works based on it which tell the story of the entire Trojan War), the normal-sized live horse became a colossal wooden statue that &amp;quot;dropped&amp;quot; a commando unit of some 40 Greek soldiers, who opened the gates of Troy to the main Greek force (who had sailed back under the cover of darkness), resulting in the &amp;quot;''Fall'' of Troy&amp;quot;. The pun is implicit, as &amp;quot;Fall of Troy&amp;quot; does not appear in the comic. &amp;quot;Fall&amp;quot; and &amp;quot;foal&amp;quot; share the initial consonant and stem vowel in Ancient Greek (''πτῶσις'' vs. ''πῶλος''), whilst spelled even more similarly in English as well as being nearly {{w|homophone}}s.&lt;br /&gt;
&lt;br /&gt;
It is not made clear whether the gifter of the horse knew of/suspected the pregnancy or whether they would have even chosen to hand it over under different circumstances. However, it is consistent with the story, and with the &amp;quot;{{w|Beware of Greeks bearing gifts}}&amp;quot; trope that originated with it, that the Greeks intentionally gifted a pregnant mare to annoy the Trojans. Surprise foals, where a mare is purchased with a hitherto unknown pregnancy, actually occur. The pregnancy is typically excused as weight gain, up until the point where a foal is discovered with its mother in the morning. Horses with rounder builds, like some pony breeds, are known for maintaining undetected pregnancies. The reason a surprise foal might be salient for the comic, beyond the &amp;quot;Foal of Troy&amp;quot; pun, is the non-trivial costs of horse ownership, which can amount to hundreds or thousands of dollars per month. Food costs are part of (but not all of) this, as the comic touches on.&lt;br /&gt;
&lt;br /&gt;
The humor in the joke comes from an anachronistic assumption — that a pregnant mare would be seen as a costly burden rather than a generous gift. In reality, during the time period referenced, horses (particularly one as large as the mare depicted in the comic) were highly valued for labor, transport, and even as a food source if necessary. Far from being an unwelcome expense, such a gift would have been considered a significant and practical boon. The joke plays on the incongruity of projecting modern attitudes backward, pretending that horses were once the kind of liability they are now.&lt;br /&gt;
&lt;br /&gt;
Archaeological evidence of a military conquest of {{w|Troy}} during the Bronze Age, or even of a major war centered on the city, is lacking. Far better evidence exists for the destruction of several iterations of the city by earthquakes. Possibly, the Trojan War legend arose as visitors attempted to explain the ruins of an earthquake-ravaged, deserted city. The &amp;quot;Foal of Troy&amp;quot; story, therefore, need not include a Greek conquest of Troy, or even a major military conflict with the Greeks.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A horse is facing Cueball and Ponytail, who are standing in front of an entrance below a tower.]&lt;br /&gt;
:[In an inset panel, Cueball is talking to Megan and Hairy.]&lt;br /&gt;
:Cueball: When the Greeks departed, they left behind a horse as a gift.&lt;br /&gt;
&lt;br /&gt;
:[Hairbun is standing behind a horse, with Cueball standing in front.]&lt;br /&gt;
:We took it as a gesture of peace, but it carried a secret payload.&lt;br /&gt;
&lt;br /&gt;
:[A smaller horse is standing behind the horse from previous panel, which is looking behind at it.]&lt;br /&gt;
:One night, from within the horse, '''''another, smaller horse emerged!'''''&lt;br /&gt;
&lt;br /&gt;
:[Close-up on Cueball.]&lt;br /&gt;
:Cueball: Our guards have been unable to determine the inner horse's objective, but it has begun to show an interest in our oats.&lt;br /&gt;
:Off-panel voice 1: An attack on Troy's food supply!&lt;br /&gt;
:Off-panel voice 2: How ''dare'' they!?&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics featuring Hairy]]&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Comics featuring Hairbun]]&lt;br /&gt;
[[Category:Animals]]&lt;br /&gt;
[[Category:Food]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3098:_Trojan_Horse&amp;diff=382842</id>
		<title>3098: Trojan Horse</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3098:_Trojan_Horse&amp;diff=382842"/>
				<updated>2025-07-30T04:56:34Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3098&lt;br /&gt;
| date      = June 4, 2025&lt;br /&gt;
| title     = Trojan Horse&lt;br /&gt;
| image     = trojan_horse_2x.png&lt;br /&gt;
| imagesize = 740x196px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Ultimately, history would imperfectly record the story of the Foal of Troy.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic presents a brief retelling of the {{w|Trojan Horse}} story, the climactic event of the legendary {{w|Trojan War}}, one of the best-known epics of ancient Greece and Rome. The retelling is a {{w|feghoot}}, set up to deliver the pun in the title text as well as a deconstruction of the story, replacing the epic elements with far more ordinary ones while keeping the tone of the tale the same.&lt;br /&gt;
&lt;br /&gt;
The premise is that the Trojan Horse story's origin is mundane. The gift to the Trojans by the (supposedly) departing Greek army, we are told, was a normal-sized, living mare, which promptly and unexpectedly dropped (i.e. gave birth to) a foal. According to the title text, this is the story of the &amp;quot;Foal of Troy&amp;quot;, which &amp;quot;history imperfectly recorded&amp;quot;. In the &amp;quot;imperfect record&amp;quot; (i.e. the {{w|Epic Cycle}} and later works based on it which tell the story of the entire Trojan War), the normal-sized live horse became a colossal wooden statue that &amp;quot;dropped&amp;quot; a commando unit of some 40 Greek soldiers, who opened the gates of Troy to the main Greek force (who had sailed back under the cover of darkness), resulting in the &amp;quot;''Fall'' of Troy&amp;quot;. The pun is implicit, as &amp;quot;Fall of Troy&amp;quot; does not appear in the comic. &amp;quot;Fall&amp;quot; and &amp;quot;foal&amp;quot; share the initial consonant and stem vowel in Ancient Greek (''πτῶσις'' vs. ''πῶλος''), whilst spelled even more similarly in English as well as being nearly {{w|homophone}}s.&lt;br /&gt;
&lt;br /&gt;
It is not made clear whether the gifter of the horse knew of/suspected the pregnancy or whether they would have even chosen to hand it over under different circumstances. However, it is consistent with the story, and with the &amp;quot;{{w|Beware of Greeks bearing gifts}}&amp;quot; trope that originated with it, that the Greeks intentionally gifted a pregnant mare to annoy the Trojans. Surprise foals, where a mare is purchased with a hitherto unknown pregnancy, actually occur. The pregnancy is typically excused as weight gain, up until the point where a foal is discovered with its mother in the morning. Horses with rounder builds, like some pony breeds, are known for maintaining undetected pregnancies. The reason a surprise foal might be salient for the comic, beyond the &amp;quot;Foal of Troy&amp;quot; pun, is the non-trivial costs of horse ownership, which can amount to hundreds or thousands of dollars per month. Food costs are part of (but not all of) this, as the comic touches on.&lt;br /&gt;
&lt;br /&gt;
The humor in the joke comes from an anachronistic assumption — that a pregnant mare would be seen as a costly burden rather than a generous gift. In reality, during the time period referenced, horses (particularly one as large as the mare depicted in the comic) were highly valued for labor, transport, and even as a food source if necessary. Far from being an unwelcome expense, such a gift would have been considered a significant and practical boon. The joke plays on the incongruity of projecting modern attitudes backward, pretending that horses were once the kind of liability they are now.&lt;br /&gt;
&lt;br /&gt;
Archaeological evidence of a military conquest of {{w|Troy}} during the Bronze Age, or even of a major war centered on the city, is lacking. Far better evidence exists for the destruction of several iterations of the city by earthquakes. Possibly, the Trojan War legend arose as visitors attempted to explain the ruins of an earthquake-ravaged, deserted city. The &amp;quot;Foal of Troy&amp;quot; story, therefore, need not include a Greek conquest of Troy, or even a major military conflict with the Greeks.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
:[A horse is facing Cueball and Ponytail, who are standing in front of an entrance below a tower.]&lt;br /&gt;
:[In an inset panel, Cueball is talking to Megan and Hairy.]&lt;br /&gt;
:Cueball: When the Greeks departed, they left behind a horse as a gift.&lt;br /&gt;
&lt;br /&gt;
:[Hairbun is standing behind a horse, with Cueball standing in front.]&lt;br /&gt;
:We took it as a gesture of peace, but it carried a secret payload.&lt;br /&gt;
&lt;br /&gt;
:[A smaller horse is standing behind the horse from previous panel, which is looking behind at it.]&lt;br /&gt;
:One night, from within the horse, '''''another, smaller horse emerged!'''''&lt;br /&gt;
&lt;br /&gt;
:[Close-up on Cueball.]&lt;br /&gt;
:Cueball: Our guards have been unable to determine the inner horse's objective, but it has begun to show an interest in our oats.&lt;br /&gt;
:Off-panel voice 1: An attack on Troy's food supply!&lt;br /&gt;
:Off-panel voice 2: How ''dare'' they!?&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics featuring Hairy]]&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Comics featuring Hairbun]]&lt;br /&gt;
[[Category:Animals]]&lt;br /&gt;
[[Category:Food]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3116:_Echo_Chamber&amp;diff=382841</id>
		<title>3116: Echo Chamber</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3116:_Echo_Chamber&amp;diff=382841"/>
				<updated>2025-07-30T04:45:27Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3116&lt;br /&gt;
| date      = July 16, 2025&lt;br /&gt;
| title     = Echo Chamber&lt;br /&gt;
| image     = echo_chamber_2x.png&lt;br /&gt;
| imagesize = 383x296px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = This is almost as bad as the time I signed up for a purely partisan fishing expedition.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
An {{w|echo chamber}} is a structure designed to maximise acoustic reverberation, and therefore echoes. In cultural terms, and particularly with social media, a ''metaphorical'' {{w|Echo chamber (media)|echo chamber}} reverberates the opinions of a group of individuals so that those individuals perceive those opinions as being the social norm.  This has resulted in {{w|political polarisation}} and to conspiracy theories such as {{w|Pizzagate conspiracy theory|Pizzagate}}.&lt;br /&gt;
&lt;br /&gt;
[[Cueball]] appears to have confused the two and built a physical chamber designed to echo back the sound of videos he is watching on social media. Unsurprisingly to the reader, but apparently not to Cueball, this turns out to be very annoying. Specifically, he appears to be watching cat videos, which are stereotypical social media content, but not usually the kind that produces accusations of 'echo chambers'. The &amp;quot;Mittens&amp;quot; mentioned in the audio is a stereotypical cat name.&lt;br /&gt;
&lt;br /&gt;
Similarly, the &amp;quot;partisan fishing expedition&amp;quot; referenced in the title text has differing metaphorical and real-life interpretations. A metaphorical &amp;quot;fishing expedition&amp;quot; is an investigation begun on flimsy or no evidence to try to find unsavory or incriminating behavior. When such an investigation is motivated by political considerations in favor of one particular political party, it may be referred to as a &amp;quot;partisan fishing expedition&amp;quot;. A &amp;quot;purely partisan fishing expedition&amp;quot; would involve a trip to catch actual fish where all the people on the fishing trip were either {{w|partisan (politics)|committed members of one political party}}, {{w|partisan (military)|members of domestic irregular military forces}}, or possibly one where such people were the intended catch. Alternatively, it could be a {{w|spearfishing}} expedition, as a {{w|partisan (weapon)|partisan}} is a type of polearm. It is unclear what strange mashup of the above Cueball found himself involved in, but at the very least it turned out to be deeply unsatisfying, if not actually dangerous.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Cueball is sitting on a chair with his hands covering his ears. He is in a circular room with a phone on a stand. All words coming out of the phone are repeated everywhere, getting larger and less opaque]&lt;br /&gt;
&lt;br /&gt;
:Phone: Here's Mittens falling into the laundry hamper for the &amp;lt;u&amp;gt;third&amp;lt;/u&amp;gt; time today!&lt;br /&gt;
:[Caption below panel:] &lt;br /&gt;
:Now that I've built one, I finally get why people complain about social media echo chambers.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3116:_Echo_Chamber&amp;diff=382840</id>
		<title>3116: Echo Chamber</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3116:_Echo_Chamber&amp;diff=382840"/>
				<updated>2025-07-30T04:22:33Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3116&lt;br /&gt;
| date      = July 16, 2025&lt;br /&gt;
| title     = Echo Chamber&lt;br /&gt;
| image     = echo_chamber_2x.png&lt;br /&gt;
| imagesize = 383x296px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = This is almost as bad as the time I signed up for a purely partisan fishing expedition.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
An {{w|echo chamber}} is a structure designed to maximise acoustic reverberation, and therefore echoes. In cultural terms, and particularly with social media, a ''metaphorical'' {{w|Echo chamber (media)|echo chamber}} reverberates the opinions of a group of individuals so that those individuals perceive those opinions as being the social norm.  This has resulted in {{w|political polarisation}} and to conspiracy theories such as {{w|Pizzagate conspiracy theory|Pizzagate}}.&lt;br /&gt;
&lt;br /&gt;
[[Cueball]] appears to have confused the two and built a physical chamber designed to echo back the sound of videos he is watching on social media. Unsurprisingly to the reader, but apparently not to Cueball, this turns out to be very annoying. Specifically, he appears to be watching cat videos, which are stereotypical social media content, but not usually the kind that produces accusations of 'echo chambers'. The &amp;quot;Mittens&amp;quot; mentioned in the audio is a stereotypical cat name.&lt;br /&gt;
&lt;br /&gt;
Similarly, the &amp;quot;partisan fishing expedition&amp;quot; referenced in the title text has differing metaphorical and real-life interpretations. A metaphorical &amp;quot;fishing expedition&amp;quot; is an investigation begun on flimsy or no evidence to try to find unsavory or incriminating behavior. When such an investigation is motivated by political considerations in favor of one particular political party, it may be referred to as a &amp;quot;partisan fishing expedition&amp;quot;. A &amp;quot;purely partisan fishing expedition&amp;quot; would involve a trip to catch actual fish where all the people on the fishing trip were either {{w|partisan (politics)|committed members of one political party}}, {{w|partisan (military)|members of domestic irregular military forces}}, or possibly one where such people were the intended catch. Alternatively, it could be a {{w|spearfishing}} expedition, as a {{w|partisan (weapon)|partisan}} is a type of polearm. It is unclear what strange mashup of the above Cueball found himself involved in, but at the very least it turned out to be deeply unsatisfying, if not actually dangerous.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
:[Cueball is sitting on a chair with his hands covering his ears. He is in a circular room with a phone on a stand. All words coming out of the phone are repeated everywhere, getting larger and less opaque]&lt;br /&gt;
&lt;br /&gt;
:Phone: Here's Mittens falling into the laundry hamper for the &amp;lt;u&amp;gt;third&amp;lt;/u&amp;gt; time today!&lt;br /&gt;
:[Caption below panel:] &lt;br /&gt;
:Now that I've built one, I finally get why people complain about social media echo chambers.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3110:_Global_Ranking&amp;diff=382839</id>
		<title>3110: Global Ranking</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3110:_Global_Ranking&amp;diff=382839"/>
				<updated>2025-07-30T04:21:51Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3110&lt;br /&gt;
| date      = July 2, 2025&lt;br /&gt;
| title     = Global Ranking&lt;br /&gt;
| image     = global_ranking_2x.png&lt;br /&gt;
| imagesize = 740x280px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Starting a meta-leaderboard for tracking who holds the record for ranking behind the most distinct people on an online leaderboard.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
[[Cueball]] comments on his ranking on a {{w|chess}} platform, such as {{w|chess.com}} or {{w|lichess}}, which both have millions of chess players. He notices that being ranked so low is quite remarkable. Indeed, most sports only rank the best, most professional participants. Especially before computerization, nobody bothered to rank more than a few hundred or thousand competitors, largely because it would have been impractical. Even in chess, up to the mid-1990s, the FIDE rating floor (the lowest possible rating in a rating system) used to be 2200, which only included some of the best players.&lt;br /&gt;
&lt;br /&gt;
As of 2025, the {{w|FIDE}} floor is 1400, which allows intermediates to be rated and ranked. However, platforms such as chess.com and lichess, which have appeared since the creation of the Internet, do not abide by the FIDE floor limitation, with chess.com placing the floor at 100 and lichess at 400, allowing even complete beginners to be rated and ranked. Ranking placements on chess.com go into the millions. Specifically, chess.com currently has about 218 million users, about 58 million of which have a [https://www.chess.com/leaderboard/live/rapid Rapid] rating. Being 7,145,000 would put Cueball just shy of the best 10% of players, with an Elo rating of about 900.&lt;br /&gt;
&lt;br /&gt;
If being in the same ranking placement in different leaderboards has the same meaning to anyone, it is possible that being the lowest rated player on chess.com makes one worse than anyone in any other activity where rankings are applied. Cueball then explains that he enjoys playing chess for communicative reasons, to gain friends. [[White Hat]] points out the toxicity that appears to be rampant among the people he is playing with, which may be found in many hobbyist online communities, especially ones that are related to gaming. But Cueball, while aware of the issue, seems to take the abuse he is getting as an expression of a complicated kind of friendship.&lt;br /&gt;
&lt;br /&gt;
In the title text, Cueball has managed to flip his terrible ranking into a great one, by creating a combined ranking of online leaderboards, where a lower ranking elsewhere translates into a high ranking in the meta-ranking.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[Cueball is seated at a desk, and uses a laptop. White Hat is standing right behind him.]&lt;br /&gt;
:Cueball: I'm ranked 7,145,000&amp;lt;sup&amp;gt;&amp;lt;small&amp;gt;th&amp;lt;/small&amp;gt;&amp;lt;/sup&amp;gt; globally on this chess platform.&lt;br /&gt;
:Cueball: It's hard to be ranked that low in '''''any''''' activity.&lt;br /&gt;
&lt;br /&gt;
:[Zoom on Cueball talking]&lt;br /&gt;
:Cueball: Few pastimes even '''''have''''' 7 million rated players. Until the Internet, it wasn't really possible. You could be this bad, but only unofficially.&lt;br /&gt;
&lt;br /&gt;
:[Cueball is now facing White Hat]&lt;br /&gt;
:Cueball: So in a sense, I'm worse at chess than anyone was at '''''anything''''' for most of human history.&lt;br /&gt;
:White Hat: Why are you still doing it?&lt;br /&gt;
&lt;br /&gt;
:[Cueball is back on the laptop]&lt;br /&gt;
:Cueball: Well, no human has ever had this many friends to play with.&lt;br /&gt;
:White Hat: That person is calling you some very obscene names.&lt;br /&gt;
:Cueball: Our friendship is complicated.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring White Hat]]&lt;br /&gt;
[[Category:Chess]]&lt;br /&gt;
[[Category:Internet]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3100:_Alert_Sound&amp;diff=382838</id>
		<title>3100: Alert Sound</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3100:_Alert_Sound&amp;diff=382838"/>
				<updated>2025-07-30T04:17:31Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3100&lt;br /&gt;
| date      = June 9, 2025&lt;br /&gt;
| title     = Alert Sound&lt;br /&gt;
| image     = alert_sound_2x.png&lt;br /&gt;
| imagesize = 393x455px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = With a good battery, the device can easily last for 5 or 10 years, although the walls probably won't.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
&amp;quot;Living well is the best revenge&amp;quot; is a {{w|Proverb|proverb}} that has been part of English-language popular culture since 1640. The message is spending your energy and attention on seeking revenge on others tends to be self-defeating. To ignore people who have mistreated you and focus instead on improving your own life is generally to your own benefit, and that may, ironically, upset those who wish you ill more than if you attacked them directly. The joke is in Randall's claim that this particular practical joke is so effective that it's the only form of revenge ''better'' than living well.&lt;br /&gt;
&lt;br /&gt;
The prank takes the form of placing a [https://www.geekextreme.com/annoyatron-holy-grail-of-pranks/ small noisemaking device] in the wall of a room that a computer is typically used in. When USB devices are plugged into a computer, there's typically a brief, audible signal to let the user know that the computer has recognized and connected with the device. Hearing this signal when you haven't plugged in a device can cause anxiety, because it could be meaningless, or it could be a sign of a problem: it could indicate that someone else is connecting to a computer in the room, or a connected device keeps spontaneously disconnecting or shutting off, or some other uncommanded and unwanted computer activity is occurring. Such a sound occurring with no obvious source will tend to perplex, and then annoy, anyone present. The truly pernicious part of the plan is that it happens repeatedly, but at long intervals (presumably random intervals between 6 and 12 hours). That makes it virtually impossible to identify the source of the sound, or to predict when it's coming again, but it would keep happening, day after day, week after week, month after month. The implication is that it would eventually drive the person into fits of anxiety, but the only solution would be something drastic (like abandoning or demolishing the room). &lt;br /&gt;
&lt;br /&gt;
The [https://quoteinvestigator.com/2018/09/02/living-well/ &amp;quot;living well&amp;quot;] proverb first appeared in a collection of [https://muse.jhu.edu/article/848854/summary &amp;quot;Outlandish Proverbs&amp;quot;], attributed to {{w|George_Herbert|George Herbert}} and, presumably, assembled from his papers after his death in 1633. The collection of more than 1,000 such proverbs also include the original forms, in English, of such chestnuts as &amp;quot;Those who live in glass houses should not throw stones&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
The title text makes an estimate for the battery life of a device that only activates every 6 hours at the most, and then jokes about the lifespan of the wall in which such a device would be set. {{tvtropes|DontExplainTheJoke|The joke being, of course}}, that users plagued by this sound will eventually start tearing down walls once they begin to narrow down the source of the sound, or will start damaging the walls out of frustration, e.g. punching holes or hitting their heads against the walls.&lt;br /&gt;
&lt;br /&gt;
This is the second comic in a row that advocates putting things in other people's walls, the first being [[3099: Neighbor-Source Heat Pump]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A loud sound appears out of nowhere in the upper left part of the panel, around the word are many small lines going away from it and before the word there is a warning emoji. In the lower right corner Cueball is sitting in an office chair at his desk in front of his computer. He is holding his hands to his head and begins by shouting and then talking.]&lt;br /&gt;
:'''⚠ Boop!''' &lt;br /&gt;
:Cueball: '''''Aaaaa!'''''&lt;br /&gt;
:Cueball: '''''I heard it again!'''''&lt;br /&gt;
:Cueball: '''''Where''''' is that  '''''coming''''' from!?&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:It turns out living well is only the '''''second''''' best revenge. The '''''best''''' revenge is making a tiny hole in someone's wall and dropping in a battery-powered capsule that, every 6-12 hours, plays the alert sound of a USB device connecting.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3080:_Tennis_Balls&amp;diff=382837</id>
		<title>3080: Tennis Balls</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3080:_Tennis_Balls&amp;diff=382837"/>
				<updated>2025-07-30T04:16:56Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3080&lt;br /&gt;
| date      = April 23, 2025&lt;br /&gt;
| title     = Tennis Balls&lt;br /&gt;
| image     = tennis_balls_2x.png&lt;br /&gt;
| imagesize = 411x574px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = After initial tests created a series of large holes in the wall of the lab, the higher-power Scanning Tunneling Tennis Ball Microscope project was quickly shut down.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
A {{w|scanning electron microscope}} produces images of a sample by scanning the surface with a focused beam of electrons, and interpreting the different signals that are generated in response. They are used in a wide range of fields to produce high-resolution images of surfaces, enabling analysis of materials, structures, and even trace evidence. Since [[Megan]] and [[Cueball]] find electrons too small to work with, they have created a macroscopic version using tennis balls instead. The tennis ball launcher uses a similar mechanism to a scanning electron microscope: it fires tennis balls, instead of electrons, over a wide range of heights, and detects objects obstructing the stream (in this case a person) by the noises generated on impact. However, this would mostly be 'useful' in scanning things at a macroscopic level, so is not really a microscope. {{w|Computational microscopy}} can be used to increase the resolution of an image beyond the size of the sampling medium by extensively analyzing details of interactions, and a tennis ball microscope could potentially be used to tune such algorithms at an observable scale — the joke of striking a human, as well as the manual single-ball operation, imply that [[Randall]] did not intend this use.&lt;br /&gt;
&lt;br /&gt;
Megan and Cueball have detected a person using their device, by the fact that it generated two yells during the scan, possibly from impacting the person's face and another sensitive part of their body. They intend to repeat the experiment to determine the person's height, by working out the angle of the tennis balls that generate the yells. Combined with the velocity and time to impact, this should give them enough information to work out the height above ground at impact and the distance from the launcher. The joke is that this height measurement could probably have been completed with a visual assessment, and with far more accuracy than using tennis balls to approximate their height. Most humans work with large-scale objects in their day-to-day lives and hence do not see by using a microscope, although the lens in the eye operates on the same principle as the objective lens in an optical one. This method is also likely to be problematic, as the person would likely duck or run away in response to being bombarded with tennis balls, affecting future measurements. This is known as the {{w|Observer effect (physics)|Observer Effect}} as well as a normal {{w|Sampling (signal processing)#Practical considerations|consideration of sampling}}. (It may also be why the 'scanning' is done from the top down, as early {{tvtropes|GroinAttack|low-hitting projectiles}} might reduce the height that later projectiles can detect.)&lt;br /&gt;
&lt;br /&gt;
The title text is a reference to {{w|scanning tunneling microscope}}s, which take advantage of the {{w|quantum tunnelling}} effect. In this case, the tennis balls were actually tunneling through the wall, creating holes in the process, which is not what tunneling electrons would do. Tunneling is a non-intuitive quantum phenomenon whereby particles may &amp;quot;teleport&amp;quot; across a barrier they would otherwise bounce off of, but it requires a number of particles of extremely low mass to exploit quantum effects, with a comparatively thin barrier, to be observable. It would not be reasonable to produce this effect at tennis ball scale with any typical building wall, but naively attempting to do so by launching tennis balls at a sufficiently high velocity (the required speed dependant upon whether they are aimed at the likes of plasterboard, brick or concrete) could lead to damaging the wall instead. &amp;quot;Scanning Tunneling Tennis Ball Microscope&amp;quot; capable of launching tennis balls at velocities, sufficient to do large holes in lab walls (presumably, concrete), could be very useful as a weapon—especially if tennis balls were swapped for stronger projectiles (e.g. tennis-ball-sized lead or steel bullets).&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Cueball fires eight tennis ball at decreasing heights using a tennis ball machine, which makes four &amp;quot;thunk&amp;quot; noises. Megan is standing behind him. The tennis ball machine has a container for tennis balls at the top, which is connected to a tube where the balls are launched. Behind the machine is a handle that Cueball holds with both hands to control the machine, and at the bottom is a stand with two legs.]&lt;br /&gt;
&lt;br /&gt;
:[Cueball has stopped firing tennis balls and is resting his hand on the handle of the machine. Ten noises come from the right side of the panel:]&lt;br /&gt;
:Bonk&lt;br /&gt;
:Bonk&lt;br /&gt;
:Bonk&lt;br /&gt;
:Bonk&lt;br /&gt;
:Bonk&lt;br /&gt;
:OW!&lt;br /&gt;
:Bonk&lt;br /&gt;
:OW!&lt;br /&gt;
:Bonk&lt;br /&gt;
:Bonk&lt;br /&gt;
:[Megan has her hand to her chin.]&lt;br /&gt;
:Megan: Ok, there's definitely a person over there. Let's do one more pass to try to measure their height.&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Electrons are small and hard to work with, so some scientists have developed a scanning tennis ball microscope instead.&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
&lt;br /&gt;
{{w|Electron tomography#Atomic Electron Tomography (AET)|Atomic electron tomography}} uses electrons to precisely identify and map the individual atoms of a sample and is leading to extensive novel materials research.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Physics]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3072:_Stargazing_4&amp;diff=382836</id>
		<title>3072: Stargazing 4</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3072:_Stargazing_4&amp;diff=382836"/>
				<updated>2025-07-30T04:16:08Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3072&lt;br /&gt;
| date      = April 4, 2025&lt;br /&gt;
| title     = Stargazing 4&lt;br /&gt;
| image     = stargazing_4_2x.png&lt;br /&gt;
| imagesize = 740x386px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = We haven't actually seen a star fall in since we invented telescopes, but I have a list of ones I'm really hoping are next.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This is the fourth comic in the [[:Category:Stargazing|Stargazing]] series, following [[2274: Stargazing 3]] which came out five years before. That was the longest time between two comics in the series so far.&lt;br /&gt;
&lt;br /&gt;
The host [[Megan]] begins the introduction by referencing negative reviews of her stargazing lessons on {{w|Yelp}}, a popular site for rating businesses such as restaurants. The reviewers doubt that she is actually a qualified astronomer due to how simplistic her lessons are; they claim she is just saying the words that come to mind. She denigrates these people as people who &amp;quot;hate cool space facts&amp;quot;, as opposed to being people who hate virtually useless space facts.&lt;br /&gt;
&lt;br /&gt;
Then she states that there are over 20 stars in the sky and some of them are over the age of 100. Both of these statements are literally true, but extreme understatements.&lt;br /&gt;
*A few thousand stars are visible to the unaided eye under good viewing conditions, though in a city there ''could'' be less than 20 stars visible even on a clear night.&lt;br /&gt;
:For a normal stargazing session the event should be held in a venue with as little light pollution as possible, which could mean the middle of an urban green space, conveniently away from lighting or else specially arranging for the most inconvenient lighting to be off for the duration. However, given the unprofessional nature of Megan's lessons, there is no guarantee that this session does not take place under less-than-ideal circumstances. Or she is perpetually unlucky as [[1556: The Sky|daylight or clouds]] may further reduce visible stars.&lt;br /&gt;
:Ignoring the need for visibility entirely, it is also estimated that there are about 200 sextillion (2×10&amp;lt;sup&amp;gt;23&amp;lt;/sup&amp;gt;) stars in the {{w|observable universe}}, of which around half would be somewhere 'in the sky' - that is, above the horizon - at any given moment from any place on Earth.&lt;br /&gt;
*Stars are typically billions of years old. While new stars are being created in nebulae all the time, it is extremely unlikely that we are seeing the nebulous start of even the shortest-lived stars within the first century of their life. One of the 'youngest' potential candidates is {{w|SN 1987A}}, which may be a neutron star less than 40 years old. But that is discounting the additional age it has acquired from it being approximately 168,000 light years away from us (making it actually 168,000+ years old). It is further undermined by arguably just being the next stage of life of the far older star that went supernova in order to leave the neutron star behind.&lt;br /&gt;
:Of stars within 100 light-years of Earth and formed afresh from interstellar material, {{w|AU Microscopii}} is slightly over 30 light-years away and considered to be very new as far as stars go. But it is still 22 ''million'' (...[https://www.reddit.com/r/Jokes/comments/7nl70d/65000011_years_ago/?rdt=39147 and thirty]) years old by current understanding.&lt;br /&gt;
&lt;br /&gt;
Megan states that our galaxy is huge and that there are more grains of sand in the {{w|Milky Way}} than grains of sand on all of Earth's beaches. This [[2733: Size Comparisons|size comparison]] is a parody of the common saying that there are more stars in the visible universe than grains of sand on all the beaches of Earth. Since the Earth's sand is a subset of all of the galaxy's sand, and there are more planets with sand other than Earth (such as Mars), there are unquestionably more grains of sand in the Milky Way than on Earth. Tangentially, it is unclear whether the stars outnumber Earth's sands, as shown here: [https://www.scientificamerican.com/article/do-stars-outnumber-the-sands-of-earths-beaches/ Do Stars Outnumber the Sands of Earth’s Beaches?] and here: [https://www.astronomy.com/science/the-ever-lasting-question-more-sand-or-stars/ The ever-lasting question: more sand or stars?]. Also, the original quote was all the sand on Earth, not just on the beaches.  Megan adds a helpful hint, calling a beach a big wet sandbox. &lt;br /&gt;
&lt;br /&gt;
She then finishes the lesson by correctly saying that there is a black hole in the center of our galaxy ({{w|Sagittarius A*}}), and that stars sometimes fall into and are consumed by the black hole. When stars come too close to black holes, they experience a {{w|tidal disruption event}} (TDE), where a star is pulled apart ({{w|spaghettification|spaghettified}}) by the black hole after passing its tidal radius, or {{w|Roche limit}}. This creates streams of material that orbit the black hole and form an accretion disk that will eventually be consumed by the black hole or ejected in jets.&lt;br /&gt;
&lt;br /&gt;
She adds her personal opinion about this fact, saying that such events are &amp;quot;hilarious&amp;quot;, and proceeds by saying that it's okay to laugh at the fate of those stars as the gravity of the black hole will prevent any signals from those stars escaping. This is due to black holes' immense gravitational attraction that prevents even light from escaping. In Megan's case the most important consequence of this fact is that anyone on planets around such stars cannot leave Yelp reviews if they hear her laughing. Thus, they cannot add to those that mock her lesson.&lt;br /&gt;
&lt;br /&gt;
However, as the Roche limit of a black hole for the average star it's consuming is usually greater than the size of the black hole's event horizon ({{w|Schwarzschild radius}}), reviews made just after the star begins spaghettification could still escape the black hole. But not only do stars not use any kind of human-made technology,{{citation needed}} but any information regarding the app Yelp has yet to reach any star near Sagittarius A*, and will do so only after 27,000 years. It is much more likely that someone living on one of the star's planets would try to leave a comment on Yelp, not the star itself, but in any case the same issues with distances would of course apply. It also seems unlikely that any planet would still be following a star when it first gets that close to a supermassive black hole, or indeed that complex life could exist on such a planet in the first place due to high levels of high-energy radiation in the galactic core.&lt;br /&gt;
&lt;br /&gt;
In the title text Megan claims that we haven't actually seen a star fall into the black hole since we invented telescopes. While it is true that we haven't observed any star fall into our closest supermassive black hole, this phenomenon has been been observed for other black holes, and the {{w|Sagittarius_A*#Discovery_of_G2_gas_cloud_on_an_accretion_course|G2 gas cloud on an accretion course}} was discovered in 2002. Megan also apparently has a list of stars she would like to see fall into the black hole. But she can just keep hoping, as humans at present have no way of changing the position of any star, and probably couldn't implement it soon upon such distant stars even if were possible. So unless she is hoping for one (or more) of the already closer stars to be observed to fall in next, she is unlikely to experience success for stars on her list.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[The background is black, Megan is in front of three others, Cueball and Ponytail to the left, and White Hat to the right. Megan is drawn in white while the background characters are in grey.]&lt;br /&gt;
:Megan: Welcome back to Stargazing.&lt;br /&gt;
:Megan: According to some ''incredibly'' rude Yelp reviews, I'm &amp;quot;not informative&amp;quot; and &amp;quot;can't possibly be an astronomer&amp;quot; and &amp;quot;just kind of say words as they occur to me.&amp;quot;&lt;br /&gt;
:Megan: I guess some losers just hate cool space facts!&lt;br /&gt;
&lt;br /&gt;
:[The sky is white, the floor is black, Megan is pointing at the sky. The background zoomed out, Hairy-like and Danish-like figures are seen standing further beyond Cueball and Ponytail on the left, White Hat has Hairbun to his right. All of the background characters are drawn as solid black silhouettes against the sky.]&lt;br /&gt;
:Megan: Anyway, that dot is a &amp;quot;star.&amp;quot;&lt;br /&gt;
:Megan: There are over 20 stars in the sky, and some of them are more than 100 years old.&lt;br /&gt;
&lt;br /&gt;
:[The background is black again, the panel zooms in on Megan's face.]&lt;br /&gt;
:Megan: Our galaxy is huge.&lt;br /&gt;
:Megan: You know the beach? That big wet sandbox?&lt;br /&gt;
:Megan: Well, there are more grains of sand in the Milky Way than in all Earth's beaches combined.&lt;br /&gt;
:Off-panel voice to the left: Wow.&lt;br /&gt;
:Off-panel voice to the right: ...Wait.&lt;br /&gt;
&lt;br /&gt;
:[The background is still in black, Megan is in front of others and has her finger raised, Ponytail is left of Megan, White Hat and Hairbun on the right. Megan is again drawn in white while the background characters are in grey.]&lt;br /&gt;
:Megan: The galaxy has a black hole at the center.&lt;br /&gt;
:Megan: Sometimes stars fall in, which is ''hilarious''.&lt;br /&gt;
:Megan: Don't worry, it's okay to laugh. The gravity prevents signals from escaping, so they can't leave Yelp reviews.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Stargazing]]&lt;br /&gt;
[[Category:Comics sharing name|Stargazing]]&lt;br /&gt;
[[Category:Comics with inverted brightness]]&lt;br /&gt;
[[Category:Astronomy]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Comics featuring White Hat]]&lt;br /&gt;
[[Category:Comics featuring Hairy]]&lt;br /&gt;
[[Category:Comics featuring Hairbun]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3097:_Bridge_Types&amp;diff=382835</id>
		<title>3097: Bridge Types</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3097:_Bridge_Types&amp;diff=382835"/>
				<updated>2025-07-30T04:15:14Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3097&lt;br /&gt;
| date      = June 2, 2025&lt;br /&gt;
| title     = Bridge Types&lt;br /&gt;
| image     = bridge_types_2x.png&lt;br /&gt;
| imagesize = 740x581px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Pontoon bridges are just linear open-sided waterbeds.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic shows, in a four-by-four grid of images, a series of bridge types. As with [[1714: Volcano Types]] and [[1874: Geologic Faults]], the comic starts off with real bridge types, and then swiftly proceeds to make things up for absurdity. That said, real-life examples of some of the joke bridges exist, as shown in the table below. The joke lies in the progression of bridge types from the simple and straightforward to the complex and ridiculous.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Name given&lt;br /&gt;
! style=&amp;quot;width:7em;&amp;quot;| Status&lt;br /&gt;
! Type&lt;br /&gt;
! Explanation&lt;br /&gt;
|-&lt;br /&gt;
! Plank&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|{{w|Beam bridge}}&lt;br /&gt;
|A straightforward piece of solid material (in this case, made of solid wood, but there are {{w|Clapper bridge|other materials}}) is the most basic form of bridge, and generally the easiest to construct, but also the weakest. Consequently, such bridges are only suitable for small spans and light weights (such as a footbridge over a stream).&lt;br /&gt;
|-&lt;br /&gt;
! Rope&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|{{w|Simple suspension bridge}}&lt;br /&gt;
|Rope bridges consist of several lengths of rope anchored on both sides of the span. Typically, one or more ropes will be intended to support the crossing load (possibly with boards or some other walkway between them), and additional ropes will act as handrails, reducing the risk of falling. These are typically only intended for foot traffic, due to their light construction and lack of rigidity. Because of the simple materials and relative ease of construction, they're often used as improvised bridges. However, a ridiculous design for this bridge type was explored in [[3048: Suspension Bridge]], in which the rope functions as a road.&lt;br /&gt;
|-&lt;br /&gt;
! Truss&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|{{w|Truss bridge}}&lt;br /&gt;
|A truss is a common type of framework consisting of supports connected in a series of triangles which provide support for a load. This design provides significant strength and rigidity with minimal material and weight. A truss bridge can either have the truss above the bridge platform (as in the drawing) or underneath it (also known as a deck truss). This is the first bridge type on this list which is commonly used for vehicle traffic. &lt;br /&gt;
|-&lt;br /&gt;
! Trestle&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|{{w|Trestle bridge}}&lt;br /&gt;
|A trestle bridge is held up by supports reaching all the way to the ground beneath. Typically at least some of the supports will slope outward to give a larger base of support. Once common for railroads, these are less popular nowadays, but are still seen in certain areas and applications.&lt;br /&gt;
|-&lt;br /&gt;
! Arch&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|{{w|Arch bridge}}&lt;br /&gt;
|Arches are one of the oldest kinds of bridges for carrying significant loads. They can be made out of rock or metal. Each span consists of an arch resting on supports. Simple arch bridges rest on both sides of a river or other gap, but longer bridges (as in the drawing) will have intermediate pillars to support multiple arches. The arches distribute the load, allowing a relatively small number of pillar to support weight across the entire deck of the bridge. &lt;br /&gt;
|-&lt;br /&gt;
! Suspended Arch&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|{{w|Through-arch bridge}}, possibly {{w|Tied-arch bridge}}&lt;br /&gt;
|A through arch bridge uses a similar concept as an arch bridge, but the deck is entirely or partially suspended below the top of the arch (in this case fully suspended, at the bottom of the arch). The tie of a tied arch bridge refers to using the deck as a tension member to restrain the horizontal spreading of the arch; without a tie, the arch's foundation must resist that horizontal loading. From the picture, it is not clear whether the deck is acting as a tie. Such bridges may use a single arch (as in the drawing) or multiple arches in succession. &lt;br /&gt;
|-&lt;br /&gt;
! Draw&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|Drawbridge (more precisely a fixed-trunnion {{w|Bascule_bridge|bascule bridge}})&lt;br /&gt;
|Drawbridges are used to allow ships to pass through obstacles like bridges. They use various methods to raise one or multiple sections of the bridge to create enough height clearance for vessels to pass through, in this case using a cable to rotate the bridge about a pivot point (trunnion).&lt;br /&gt;
|-&lt;br /&gt;
! Suspension&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|{{w|Suspension bridge}}&lt;br /&gt;
|A suspension bridge suspends its deck with cables or rods from a cable linked to a pillar and a point a certain distance from each pillar&lt;br /&gt;
|-&lt;br /&gt;
! Filler&lt;br /&gt;
|{{Maybe|Real}} method of maintaining {{w|Grade (slope)|grade}}, not really a 'bridge'&lt;br /&gt;
|{{w|Embankment (earthworks)|Embankment}}, {{w|Causeway}} or even a {{w|Dam}}&lt;br /&gt;
|Serves the purpose of allowing travel across the gap, but by removing (or {{w|Culvert|mostly removing}}) passage through the gap itself. By filling the gap with hard, irregular material (most commonly rocks), support can be provided, while still allowing water to flow through the gaps. Due to the generally small size of the gaps, generally only slow-flowing water can reliably get through. &lt;br /&gt;
|-&lt;br /&gt;
! Budget Overrun&lt;br /&gt;
| {{Yes|Real}}&amp;lt;br/&amp;gt;(with an absurd name)&lt;br /&gt;
|{{w|Cable-stayed bridge}}&lt;br /&gt;
|Specifically, the pictured bridge is a {{w|cantilever spar cable-stayed bridge}}, similar in appearance to the {{w|Samuel Beckett Bridge}} in Dublin or the {{w|Erasmusbrug}} in Rotterdam. Many bridges in this category suffer severe cost overruns.&amp;lt;br/&amp;gt;Randall may be drawing upon his local knowledge of the {{w|Leonard P. Zakim Bunker Hill Memorial Bridge|Zakim Bridge}} in downtown Boston's {{w|Big Dig}}, also strongly associated with cost overruns. Also, while not a bridge, the budget overrun and diagonally inclined tower supporting cables may be a reference to {{w|Montreal Tower}} and {{w|Olympic Stadium (Montreal)|Olympic Stadium}}, which has suffered infamous budget overruns, costing over 6.7 times the initially planned amount.&lt;br /&gt;
|-&lt;br /&gt;
! Jump&lt;br /&gt;
| {{No|Not real}}&lt;br /&gt;
|Similar to a pair of small {{w|cantilever bridge}}s, constructed at an incline.&lt;br /&gt;
|A &amp;quot;bridge&amp;quot; that appears to be being used by a skateboarder, though in a manner far more dangerous&amp;lt;!-- e.g. 'underjumping' could send you into the hard edge of the landing ramp!--&amp;gt; than any jump in a typical skatepark. While not {{w|London Buses route 78#History|normally}} a feature of the highway, jump ramps can be used for gap-crossing stunts by almost any vehicle with sufficient speed. Partial bridges, which allow ''some'' vehicles using them to safely cross the gap, iconically featured in {{w|The Dukes of Hazzard}} TV show, as well as common in various {{w|The Man with the Golden Gun (film)#Car stunts|action}} {{w|Speed (1994 film)#Filming|films}}, though typically less easy to use correctly than the setting implies.&lt;br /&gt;
|-&lt;br /&gt;
! Halfhearted&lt;br /&gt;
|{{Maybe|Not}} real under this name, but with real analogs&lt;br /&gt;
|[https://www.archdaily.com/184921/moses-bridge-road-architecten Moses bridge]&lt;br /&gt;
|The diagram shows that there was barely any attempt to bridge the gap in the landscape at all, just take the 'deck' down into it and back up out again. The concept may have been inspired, in part, by [https://www.fastcompany.com/90186315/the-strange-art-of-the-melting-bridges-of-google-earth an artifact in Google Earth software].&lt;br /&gt;
Structures exist, at the {{w|Fort de Roovere}} in Halsteren, Netherlands and elsewhere, that resemble this 'solution', though these would have involved much thought and commitment in their building, possibly more 'hearted', even, than any more conventional bridge design, especially in the provision of stairs to allow easier ingress/egress (at least for foot traffic) than in the comic's version.&lt;br /&gt;
|-&lt;br /&gt;
! Waterbed&lt;br /&gt;
| {{No|Not a bridge}}&lt;br /&gt;
|{{w|Waterbed}}&lt;br /&gt;
|Rather than a bridge, it is more like another version of a causeway (see 'Filler') using trapped water to maintain the upper surface.&lt;br /&gt;
Named for a 'mattress' type, which is usually a raised surface ''on top of'' a piece of bedframe, with an unusual approach to padding and comfort.&lt;br /&gt;
|-&lt;br /&gt;
! L'Engle&lt;br /&gt;
| {{No|Not real}}&lt;br /&gt;
|[https://www.refinery29.com/en-us/2018/03/192728/tesseract-definition-wrinkle-in-time-space-dimension Tesseract AWIT]&amp;lt;br&amp;gt;not {{w|Tesseract|Tesseract (geometry)}}&amp;lt;br&amp;gt;cf. {{w|Einstein–Rosen bridge}}&lt;br /&gt;
|References {{w|A Wrinkle In Time}} by Madeleine L'Engle. Characters cross great distances by &amp;quot;tessering&amp;quot;, moving via a tesseract through a higher dimension which essentially brings the two ends of the journey together from the perspective of the traveler.&amp;lt;br/&amp;gt;The image shows the two ends of the gap being brought together, with the gap apparently crumpled in between them.&lt;br /&gt;
|-&lt;br /&gt;
! Fun&lt;br /&gt;
| {{No|Not real}}&lt;br /&gt;
|{{w|Vertical loop}}&lt;br /&gt;
|It is a loop-de-loop, not normally a practical or necessary way of bridging a gap. Something previously seen, in an arguably even more impractical manner, in [[2935: Ocean Loop]].&lt;br /&gt;
|-&lt;br /&gt;
! Repurposed Elevator&lt;br /&gt;
|{{Maybe|Real}}, but not as displayed&lt;br /&gt;
|Horizontal elevator / {{w|People mover|People mover}}&lt;br /&gt;
|There are various implementations of such designs, the best-known one is probably the {{w|Schmid Peoplemover|Schmid Peoplemover}}.&lt;br /&gt;
However, unlike a regular people mover, where the door stays upright, the image shows a regular elevator that has been rotated 90 degrees. This not actually its own type of bridge, but just a type of plank bridge where the elevator shaft (or one side of the elevator shaft) is used as a plank - closing the circle to the first image.&lt;br /&gt;
|-&lt;br /&gt;
! (Title text)&lt;br /&gt;
| {{Yes|Real}}&lt;br /&gt;
|{{w|Pontoon bridge}}&lt;br /&gt;
|Pontoon bridges are described as a series of fictitious &amp;quot;waterbed bridges&amp;quot;, as shown above, but constructed without sides. This would mean that that the 'bed'-supporting water flows in one side and out the other, if there is any passage or tidal flow of water. It may technically mean that you cannot cross {{w|The Same River Twice|the same bridge twice}}.&lt;br /&gt;
Pontoons rely upon buoyancy, either of the whole deck or distinct floating elements, whereas an enclosed &amp;quot;waterbed&amp;quot; bridge would rely upon the strength of the membrane to keep the mass of water within it, and thus the deck above that mass.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
:Bridge Types&lt;br /&gt;
&lt;br /&gt;
:[A 4x4 matrix of 16 ways to cross the same rectangular hole in the ground]&lt;br /&gt;
&lt;br /&gt;
:Plank [shows a plank laid over the hole]&lt;br /&gt;
&lt;br /&gt;
:Rope [shows a rope bridge with rope guardrail]&lt;br /&gt;
&lt;br /&gt;
:Truss [shows a truss bridge with a triangular truss above the bridge deck]&lt;br /&gt;
&lt;br /&gt;
:Trestle [shows a trestle bridge]&lt;br /&gt;
&lt;br /&gt;
:Arch [shows stone arches supporting a straight deck]&lt;br /&gt;
&lt;br /&gt;
:Suspended Arch [shows a single arch, with the bridge deck suspended from it]&lt;br /&gt;
&lt;br /&gt;
:Draw [shows a truss bridge, with one half opened like an unrealistic draw bridge]&lt;br /&gt;
&lt;br /&gt;
:Suspension [shows the bridge deck suspended from a cable strung between two pillars and the shores]&lt;br /&gt;
&lt;br /&gt;
:Filler [shows the hole filled with dirt and stones]&lt;br /&gt;
&lt;br /&gt;
:Budget Overrun [shows a bridge deck suspended by cables from an artistically shaped pillar]&lt;br /&gt;
&lt;br /&gt;
:Jump [shows two ramps at the edges of the hole, and a skateboarder jumping across the hole]&lt;br /&gt;
&lt;br /&gt;
:Halfhearted [shows a ramp at each side of the hole that leads down to the bottom]&lt;br /&gt;
&lt;br /&gt;
:Waterbed [shows the hole filled with water, two fish and an octopus, a wobbly covering, and two stick figures crossing]&lt;br /&gt;
&lt;br /&gt;
:L'Engle [shows the hole warped such that the opposite shores meet]&lt;br /&gt;
&lt;br /&gt;
:Fun [shows a loop-de-loop rollercoaster bridging the hole, and a skateboarder using it to get across]&lt;br /&gt;
&lt;br /&gt;
:Repurposed Elevator [shows an elevator tower, rotated sideways as a whole, laid across the hole. 2 stick figures using the elevator are also rotated.]&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:Engineering]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Multiple Cueballs]]&lt;br /&gt;
[[Category:Animals]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3075:_Anachronym_Challenge&amp;diff=382834</id>
		<title>3075: Anachronym Challenge</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3075:_Anachronym_Challenge&amp;diff=382834"/>
				<updated>2025-07-30T04:14:53Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3075&lt;br /&gt;
| date      = April 11, 2025&lt;br /&gt;
| title     = Anachronym Challenge&lt;br /&gt;
| image     = anachronym_challenge_2x.png&lt;br /&gt;
| imagesize = 265x404px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = I have to pay with paper money.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
[[Cueball]] is completing a self-imposed challenge in which he must complete a shopping trip while only buying and using things whose names indicate a material that is not the one used to make it. The items on the list are all {{wiktionary|anachronym}}s. &lt;br /&gt;
&lt;br /&gt;
A number of manufactured objects were named for (or at least had names that refer to) their primary materials of construction. With time and advancing technology, it's not uncommon for alternate materials to become available that are one or more of more suitable, less expensive, and/or easier to manufacture, and so the materials of construction change. Names, however, become ingrained in the public consciousness, and can be more difficult to change than a manufacturing process, which leads to the disconnect in this strip: objects that were named for the materials they ''used'' to be made of, but are now made of something different. &lt;br /&gt;
&lt;br /&gt;
When these items were originally sold with different materials they may have been seen as &amp;quot;fake&amp;quot;. Paper money has also been seen as fake, as its value is written on its face and proposed by a government rather than held in its material such as gold or silver coins.&lt;br /&gt;
&lt;br /&gt;
It should be noted that many of the objects listed on Cueball's shopping list are still sometimes made with the materials that they are named after, they've just been supplanted by alternate materials for the mass market. Silverware can be made of sterling silver, especially in the cutlery of high-end establishments,{{acn}} but, unlike steel, traditional pure silver requires regular polishing to retain its finish. Cleaning sponges made of sea sponges are expensive, but can be [https://tofinosoapcompany.com/products/natural-sea-sponge-sustainably-harvested purchased]. Linens made from flax are available; and some people consider it [https://www.roughlinen.com/en-ca/blogs/newsletters/linen-vs-flax to be the better material], but that's a clear minority of the modern market. Some wood clubs are still made from wood, specifically {{w|persimmon}}. {{w|Banknotes of the Japanese yen}} are [https://www.npb.go.jp/en/products/intro/tokutyou.html still made] from wood fiber from ''E. chrysantha'' and abaca pulp. Most of the traditional items can be found in antique sales at least occasionally, and some people still use them such as in communities that have separated from modern industry.&lt;br /&gt;
&lt;br /&gt;
Where items named for &amp;quot;iron&amp;quot; are now made with steel or stainless steel, they are still technically made from iron, since steel is an alloy largely consisting of iron as an element (98% or more iron for regular steels, and ~66-75% iron for stainless steel).  In common conversation, however, iron is usually used to refer to unalloyed cast or wrought iron, not steel.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot; style=&amp;quot;margin-left:0px&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Item !! Original material !! Original still produced and sold in industrial cultures?!! Actually made with !! class=&amp;quot;unsortable&amp;quot;| Explanation &lt;br /&gt;
|-&lt;br /&gt;
! {{w|Aluminium foil|Tin foil}} &lt;br /&gt;
| {{w|Tin}} &lt;br /&gt;
| {{Yes|[https://www.thermofisher.com/order/catalog/product/044154.RG Yes]}}&lt;br /&gt;
| Aluminum &lt;br /&gt;
| Formerly &amp;quot;tin foil&amp;quot; was made of the metal tin, but aluminum supplanted tin in the early-to-mid 20th century, as aluminum is cheaper and more durable. Foils of all metals are available for industrial and laboratory purposes, but one no longer sees tin foil marketed or sold for common home use, possibly due to health concerns.&lt;br /&gt;
|-&lt;br /&gt;
! {{w|Sponge (tool)|Sponges}}&lt;br /&gt;
| {{w|Sponge|Sea sponges}}, i.e., marine invertebrates in the phylum Porifera &lt;br /&gt;
|{{Yes|Yes}}&lt;br /&gt;
| Polyester, polyurethane, cellulose &lt;br /&gt;
| A sponge is a cleaning aid made of soft, porous material. Typically used for cleaning impervious surfaces, sponges are especially good at absorbing water and water-based solutions. Cleaning sponges made of sea sponges are expensive, but can be purchased. &lt;br /&gt;
|-&lt;br /&gt;
! {{w|Silverware}} &lt;br /&gt;
| {{w|Silver}} &lt;br /&gt;
|{{Yes|Yes, though at greater expense than silver-plated or silver-like}}&lt;br /&gt;
| Stainless steel &lt;br /&gt;
| Covers eating utensils, plates and dishes, candlesticks and trophies, which may all these days be electroplated, cupro-nickel alloys or stainless steel.&lt;br /&gt;
Likely intended to only refer to knives, forks and spoons, which may be found in family heirloom cutlery collections. Silverware can be made of sterling silver, especially in the cutlery of high-end establishments,{{Actual citation needed}} but, unlike steel, traditional pure silver requires regular polishing to retain its finish. &lt;br /&gt;
|-&lt;br /&gt;
! {{w|Linens}} &lt;br /&gt;
| {{w|Flax}} &lt;br /&gt;
|{{Yes|Yes}} &lt;br /&gt;
| Cotton, hemp, polyester &lt;br /&gt;
| Linens, also referred to uncountably as linen, are fabric household goods intended for daily use, such as bedding, tablecloths and towels. Linens made from flax are available; and some people consider it to be the better material, but that's a clear minority of the modern market.&lt;br /&gt;
|-&lt;br /&gt;
! {{w|Clothes iron|Clothes iron}} &lt;br /&gt;
| {{w|Iron}} &lt;br /&gt;
|{{No|No}}&lt;br /&gt;
| Aluminum, stainless steel &amp;amp; plastics &lt;br /&gt;
| A device to remove wrinkles in clothing by applying a hot, smooth surface. Early irons were simply flat slabs of iron with handles attached, which had to be manually heated on a stove or fire, or by placing hot coals or similar in a housing on the upward face of the iron. These can be found among antique collections. Modern irons are nearly always electric, and generally use a stainless steel face and plastic housing (which holds the wiring and other components, as well as acting as the handle.)&lt;br /&gt;
|- &lt;br /&gt;
! {{w|Ironing board|Ironing board}} &lt;br /&gt;
| Wooden board &lt;br /&gt;
|{{Yes|Yes}}&lt;br /&gt;
| Metal, fabric cover &lt;br /&gt;
| Flat surface for ironing clothes. Wooden boards have largely been supplanted by light but rigid steel sheets with a thin cover of foam and fabric.&lt;br /&gt;
|- &lt;br /&gt;
! {{w|Corrective lens#Reading glasses|Reading glasses}} &lt;br /&gt;
| {{w|Glass}} &lt;br /&gt;
|{{Yes|Yes}}&lt;br /&gt;
| Optical plastics &lt;br /&gt;
| Used to assist farsighted people with focusing on things up close. Glass lenses have typically been replaced by {{w|CR-39}} plastic due to glass's danger of shattering and higher weight.&lt;br /&gt;
|-&lt;br /&gt;
! {{w|Iron (golf)#Short irons|9 iron}} &lt;br /&gt;
| Iron &lt;br /&gt;
|{{Yes|Yes}}&lt;br /&gt;
| Cast {{w|stainless steel}}, {{w|carbon steel}} &lt;br /&gt;
| A type of short golf club, normally used for short, lofty approach shots when approaching the green.&lt;br /&gt;
|-&lt;br /&gt;
! {{w|Wood (golf)|3 wood}}&lt;br /&gt;
| Wood &lt;br /&gt;
|{{Yes|Yes}}&lt;br /&gt;
| Titanium, carbon fiber &lt;br /&gt;
| A type of golf club optimized for a long fairway shot off the tee. Some wood clubs are still made from wood, specifically persimmon.&lt;br /&gt;
|-&lt;br /&gt;
! {{w|Sidewalk chalk|Sidewalk chalk}}&lt;br /&gt;
| {{w|Calcite}} chalk &lt;br /&gt;
|{{No|No}}&lt;br /&gt;
| Calcium sulfate ({{w|gypsum}}) &lt;br /&gt;
| Used for making marks on pavement or rocks (e.g., for entertainment, for temporary signs or indicators).&lt;br /&gt;
|-&lt;br /&gt;
! {{w|Rubber duck|Rubber duck}} &lt;br /&gt;
| {{w|Rubber}} &lt;br /&gt;
| {{Yes|[https://heveaplanet.com/products/kawan-rubberduck-1x1 Yes]}} &lt;br /&gt;
| Vinyl plastics &lt;br /&gt;
| A rubber duck, or a rubber duckie, is a toy shaped like a duck, that is usually yellow with a flat base. It may be made of rubber or rubber-like material such as vinyl plastic. They are believed to improve developmental skills in children during water play. Also taken advantage of in {{w|Friendly Floatees spill|science}}, {{w|Rubber duck race|racing}} and {{w|Rubber duck debugging| programming}}.&lt;br /&gt;
|-&lt;br /&gt;
! {{w|Paper money|Paper money}} (title text) &lt;br /&gt;
| Paper &lt;br /&gt;
|{{Yes|Yes, but usually {{w|cotton paper}}}}&lt;br /&gt;
| Cotton, linen fibers (U.S. note), polypropylene. &lt;br /&gt;
| Currency issued by banks in the form of promissory notes. Banknotes of the Japanese yen are still made from wood fiber from E. chrysantha and abaca pulp. &lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
&lt;br /&gt;
:[Cueball is looking at a phone, or perhaps a piece of paper, in his hand while holding his other hand on the handle of a shopping cart. Above the shopping cart, an underlined header and a bullet list are shown:]&lt;br /&gt;
:&amp;lt;u&amp;gt;Shopping List&amp;lt;/u&amp;gt;&lt;br /&gt;
:* Tin Foil&lt;br /&gt;
:* Sponges&lt;br /&gt;
:* Silverware&lt;br /&gt;
:* Linens&lt;br /&gt;
:* Iron &amp;amp; Ironing Board&lt;br /&gt;
:* Reading Glasses&lt;br /&gt;
:* 9 Iron &amp;amp; 3 Wood&lt;br /&gt;
:* Sidewalk Chalk&lt;br /&gt;
:* Rubber Duck&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:I'm trying to do a shopping trip where I only buy stuff that's no longer made from the material it's named after.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Language]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3099:_Neighbor-Source_Heat_Pump&amp;diff=382833</id>
		<title>3099: Neighbor-Source Heat Pump</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3099:_Neighbor-Source_Heat_Pump&amp;diff=382833"/>
				<updated>2025-07-30T04:14:13Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3099&lt;br /&gt;
| date      = June 6, 2025&lt;br /&gt;
| title     = Neighbor-Source Heat Pump&lt;br /&gt;
| image     = neighbor_source_heat_pump_2x.png&lt;br /&gt;
| imagesize = 431x284px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = The installation of the pipes on the inside of the insulation can be challenging, especially when the neighbor could come home at any minute.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
Since the energy crisis of the 1970s, electric {{w|air source heat pump}}s have been offered as a more efficient alternative to burning fuel. Much like the operation of a typical refrigerator or air-conditioner, heat pumps use a relatively small amount of power to move heat to where it is most needed (away from where heat is ''not'' required or deeper cold can be tolerably dispersed). This is most commonly and conveniently done using a heat exchanger installed on the outside wall of the building/apartment, which can extract heat from the ambient outside air and use that to heat the inside of the household, concentrating the energy to provide temperatures typically over and above those originally present in either location. Because of the varying nature of the external climate, this is less efficient (or at least more technically difficult) in colder weather, the time when the heating would be most appreciated. Although the effectiveness of cold climate heat pumps has [https://www.youtube.com/watch?v=7J52mDjZzto significantly improved in recent decades], heat pumps still suffer from a poor reputation compared to combustion heating due to their poor cold weather performance, resulting in discomfort, high electricity usage/cost, or both.&lt;br /&gt;
&lt;br /&gt;
An alternate method of harvesting heat is the {{w|ground source heat pump}}. This does the same job of extracting heat energy from ''its'' surroundings (pipes sent deep into the ground, rather than just being exposed to the air by the side of the building), and benefits from the more constant temperature of the pedosphere (or deeper), which is often below the [[402: 1,000 Miles North|frost-line]], always giving a ''relatively'' warm heat-source to extract energy from, even in the depths of winter. If set up to also cool a home, in warm conditions, it also finds the same reliably small range of ground-temperatures useful in being ''cooler'' than the ambient air of summer, thus being more suited to disperse excess heat into whilst cooling the indoor environment. A further method, the water source heat pump, similarly makes use of a sufficiently large body of water's tendency to provide a near constant 4°C temperature (whatever the external conditions) in its depths.&lt;br /&gt;
&lt;br /&gt;
In this comic, [[Randall]] goes further and finds a handy source of heat (in winter) and cold (in summer)… the house of a neighbor, which is itself being actively maintained (perhaps by more traditional heating and cooling technology) at a temperature which approaches his own preference for temperature. Being thermally inverted to the current seasonal conditions, it would be even more economical to tap into for heat during cold times and coolness during the warmer ones. That is, it would be for Randall, not the neighbor who is now forced to effectively air-condition ''two'' buildings, instead of the one they thought they were maintaining. This is accomplished by sending the pipes (that ''might'' have been just buried in the ground) from the heat-exchange unit off into the walls of the neighboring house to tap into the artificially-maintained temperature there.&lt;br /&gt;
&lt;br /&gt;
While the small-scale application suggested here can thus be assumed to cause neighborly trouble, this concept has been in use at much larger scales for about the last ten years with virtually no repercussions — which is largely due to [https://www.bbc.com/future/article/20200908-the-buildings-warmed-by-the-human-body the tapped neighboring premises not being residential buildings]. On top of this, {{w|district heating}}, or &amp;quot;neighborhood heating&amp;quot; is a real system where a centralized heat source provides heating for multiple buildings in the neighborhood, either through a dedicated heat source (created to exploit the economies of scale) just for this purpose, or else taking waste heat from some other local amenity (e.g. a waste incinerator) that is producing sufficient quantities to spare as a side-effect of its core operation. This is humorously in contrast to the comic where someone steals heat from one of their neighbors as one might {{w|Cable television piracy|steal Cable TV}}.&lt;br /&gt;
&lt;br /&gt;
The title text addresses some of the issues involved when trying to properly install the Neighbor-Source Heat Pump, without the neighbor realizing that they are about to be leeched from in this way. It may already be quite difficult to interfere with the structure of the neighbouring house (in this case, by feeding pipes up into at least two of its wall cavities) without this being noticed once the absent neighbour returns, but to do so under the imminent risk of being observed at work by the neighbor arriving home would take [[666: Silent Hammer|even more care]] to accomplish.&lt;br /&gt;
&lt;br /&gt;
This was the first of two comics in a row that advocate putting things in other people's walls, as this was followed by [[3100: Alert Sound]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Two houses are shown next to each other. They have almost identical facades with a base, two windows on either side of a door and a chimney to the right on the roof. But next to the left house there is a small box with two light-blue pipes going from the house to the box. From the bottom of the box two similar light-blue pipes goes a bit down under ground, the left further than the right, and then they bend to the right and goes under the neighboring house to the right. The upper pipe closest to the ground is shown to enter the wall of the right house, going almost up to the roof, and then bending sharply around going down below ground. Then it goes under ground to the other side of the house and do the same in the right wall, going up and down. Where it goes under ground, it connects to the the other pipe that has gone all the way straight under the house.]&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:A covertly-installed '''''Neighbor-Source Heat Pump''''' takes advantage of the fact that your neighbor keeps their house cool in the summer and warm in the winter.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Physics]]&lt;br /&gt;
[[Category:Engineering]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3101:_Good_Science&amp;diff=382832</id>
		<title>3101: Good Science</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3101:_Good_Science&amp;diff=382832"/>
				<updated>2025-07-30T04:13:57Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3101&lt;br /&gt;
| date      = June 11, 2025&lt;br /&gt;
| title     = Good Science&lt;br /&gt;
| image     = good_science_2x.png&lt;br /&gt;
| imagesize = 387x833px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = If you think curiosity without rigor is bad, you should see rigor without curiosity.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
[[Miss Lenhart]] is teaching a class to [[Jill]] and a [[Cueball]]-like kid. Based on her opening statement &amp;quot;I'm supposed to give you the tools to do good science.&amp;quot; this is likely a general class on the principles of science, although it could be the start of a class on a specific field of science such as biology or physics. Classes about the principles of science (i.e. the scientific method, or what makes &amp;quot;good science&amp;quot;) are common at the very introductory level, such as middle school science classes that give young students a basic framework to understand science, and also at the very advanced level, where PhD students take classes on the philosophy and history of science with detailed examination of epistemology, metaphysics, logic and ontology to be able to understand how their research affects the world.&lt;br /&gt;
&lt;br /&gt;
However, Miss Lenhart explains that doing &amp;quot;good science&amp;quot; is hard, because research [https://www.discovermagazine.com/the-sciences/5-times-that-science-got-it-wrong often] [https://www.famousscientists.org/10-most-famous-scientific-theories-that-were-later-debunked/ produces] [https://www.siliconrepublic.com/innovation/scientific-theories-proven-wrong incorrect] {{w|List of experimental errors and frauds in physics|results}}. She wonders what are the key things she should teach her students so that their scientific inquiry ends up being successful. She lists a series of items that are commonly suggested as leading to successful research, such as collaboration or skepticism, and explains that she performed a {{w|regression analysis}} (a mathematical technique often used in science), to find out which were most important. She concludes that the two most crucial factors are genuine curiosity about the subject (which makes sense as something that would drive scientists to achieve good results) and {{w|ammonium hydroxide}}, a chemical which does see some {{w|Ammonia_solution#Laboratory_use|laboratory use}}, but it does not obviously relate significantly to achieving good results (although it's often used to clean laboratory equipment, so it is possible that regular or thorough cleaning of equipment reduces experimental error).{{Actual citation needed}}&lt;br /&gt;
&lt;br /&gt;
This may illustrate a potential problem with regression analyses caused by including too many predictor variables for the available data. This can cause random statistical noise in the sample to be interpreted as a meaningful effect.&lt;br /&gt;
&lt;br /&gt;
When Jill points out that ammonium hydroxide is a nonsensical factor, Miss Lenhart replies that Jill is doing good science. The joke is that including ammonium hydroxide was just a means to get Jill to question the results. It also suggests that skepticism is actually the second crucial factor after genuine curiosity, as being skeptical of ammonium hydroxide as an important factor led to Jill's newfound success as a scientist. Alternatively, because Jill is being curious about how ammonia got onto the list, she is performing good science by using both curiosity and ammonia.&lt;br /&gt;
&lt;br /&gt;
The title text addresses a common criticism in scientific circles that science is only good if it has rigor — that is, if it is well-documented and follows all of the proper procedure. It says that if curiosity without rigor is bad (in other words someone earnestly trying to figure out the answer, but doing it in a sloppy way) the opposite, rigor without curiosity, is much worse (a person who produces professional looking results but who doesn't care whether they are right or wrong). There are at least two issues with a scientist who is rigorous but uncurious. First is that, in the modern world, science has a very high social and cultural status, due to its incredible achievements over the past century and a half (from electric power to spaceflight to medical care). As a result, people tend to be very deferential to science, and the trappings of science (lab coats, clipboards, etc.) command respect. A rigorous but uncurious scientist could get people to believe more strongly in the wrong answer (for an example of how symbols like lab coats and clipboards can influence human behavior, see the {{w|Milgram experiment}}). Second, a rigorous scientist could become convinced of their performance because of their rigor, mistaking the outward process of science for science itself. In that case, beyond the initial wrong results due to their incuriosity, they could become resistant to changing their conclusions even when presented with decisive evidence to the contrary, sometimes to the point of suppressing other scientists who have reached the correct answer.&lt;br /&gt;
&lt;br /&gt;
Randall has previously suggested that rigor is not as important in science as some make it out to be, when discussing ''{{w|MythBusters}}'' (see [[397: Unscientific]]).&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Don't remove this notice too soon.}}&lt;br /&gt;
:[Miss Lenhart is standing in front of a whiteboard with some scribbles on it.]&lt;br /&gt;
:Miss Lenhart: I'm supposed to give you the tools to do good science.&lt;br /&gt;
&lt;br /&gt;
:[Miss Lenhart is now standing in front of Jill and Cueball, who are seated at classroom desks.]&lt;br /&gt;
:Miss Lenhart: But what '''''are''''' those tools?&lt;br /&gt;
:Miss Lenhart: Methodology is hard and there are so many ways to get incorrect results.&lt;br /&gt;
:Miss Lenhart: What is the magic ingredient that makes for good science?&lt;br /&gt;
&lt;br /&gt;
:[Miss Lenhart headshot.]&lt;br /&gt;
:Miss Lenhart: To figure it out, I ran a regression with all the factors people say are important:&lt;br /&gt;
:[A list, presented in a sub-panel that Miss Lenhart is pointing to:]&lt;br /&gt;
:Outcome variable:&lt;br /&gt;
::• correct scientific results&lt;br /&gt;
:Predictors:&lt;br /&gt;
::• collaboration&lt;br /&gt;
::• skepticism of others' claims&lt;br /&gt;
::• questioning your own beliefs&lt;br /&gt;
::• trying to falsify hypotheses&lt;br /&gt;
::• checking citations&lt;br /&gt;
::• statistical rigor&lt;br /&gt;
::• blinded analysis&lt;br /&gt;
::• financial disclosure&lt;br /&gt;
::• open data&lt;br /&gt;
::[presumably the list goes on, as it runs off the visible part of the panel]&lt;br /&gt;
&lt;br /&gt;
:[Another Miss Lenhart headshot.]&lt;br /&gt;
:Miss Lenhart: The regression says two ingredients are the most crucial:&lt;br /&gt;
:1) genuine curiosity about the answer to a question, and&lt;br /&gt;
:2) ammonium hydroxide&lt;br /&gt;
&lt;br /&gt;
:[Miss Lenhart, standing, and Jill, seated at desk]&lt;br /&gt;
:Jill: Wait, why did '''''ammonia''''' score so high? How did it even get on the list?&lt;br /&gt;
:Miss Lenhart: ...and now you're doing good science!&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Miss Lenhart]]&lt;br /&gt;
[[Category:Comics featuring Jill]]&lt;br /&gt;
[[Category:Science]]&lt;br /&gt;
[[Category:Comics featuring children]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3090:_Sail_Physics&amp;diff=382831</id>
		<title>3090: Sail Physics</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3090:_Sail_Physics&amp;diff=382831"/>
				<updated>2025-07-30T04:13:06Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3090&lt;br /&gt;
| date      = May 16, 2025&lt;br /&gt;
| title     = Sail Physics&lt;br /&gt;
| image     = sail_physics_2x.png&lt;br /&gt;
| imagesize = 699x263px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Turning in other directions can be accomplished by using a magnetized centerboard and ocean currents, since a current flowing through a magnetic field induces a Laplace force.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic starts off looking like a typical explanation of how {{w|sailboat}}s can travel upwind — a topic that continues to spark debate and refinement in physics circles. However, it quickly takes a strange tack into a completely fictional and incorrect theory involving triboelectric charging and the Lorentz force, rather than referencing real mechanisms like {{w|airfoil}} aerodynamics.&lt;br /&gt;
&lt;br /&gt;
This humor works at another level — most interaction of physical things at macro scale (humans and boat sized objects) are electromagnetic in nature.  So one unaware of sailing mechanics may start to explain the situation with electromagnetism, and could come to this line of thinking, but it is wrong. If we are to consider this, we find that either no force is appearing in the direction shown, or very little. Sailing into the wind was also the topic of [[3013: Kedging Cannon]].&lt;br /&gt;
&lt;br /&gt;
; First panel&lt;br /&gt;
&lt;br /&gt;
: The first panel is a fairly accurate diagram used to explain the reasons why a boat can sail into the wind (see below), it just sets up the scenario.&lt;br /&gt;
&lt;br /&gt;
; Second panel&lt;br /&gt;
&lt;br /&gt;
: The second panel portrays the {{w|triboelectric effect}}, which is transfer of static charge through the motion between two 'objects', which in turn depends on effective interaction surface area. It shows charge being accumulated by the wind stripping electrons from the sail of the boat, leaving the sail positively charged. Among other problems, the charge that can be acquired is typically very small.&lt;br /&gt;
&lt;br /&gt;
; Third panel&lt;br /&gt;
&lt;br /&gt;
: The third panel shows the boat being blown sideways by the wind, which a sideways-facing boat hull would highly resist (see below). This motion of a charged body through the {{w|Earth's magnetic field}}, however,  results in a {{w|Lorentz force}}. Depending upon the relative directions of motion and the magnetic field, this ''could'' generate a perpendicular force in the direction the hull is pointing, as indicated, assuming the entire premise was even as promised.&lt;br /&gt;
&lt;br /&gt;
; Fourth panel&lt;br /&gt;
&lt;br /&gt;
: The final panel demonstrates this force diverting the downwind (and sideways) motion of the boat forward. As well as the various other problems that exist with the whole scenario, this is contrary to promise of allowing the boat to sail upwind, as the originally indicated wind direction and the finally indicated path results, if anything, in movement slightly downwind.&lt;br /&gt;
&lt;br /&gt;
; Title text&lt;br /&gt;
&lt;br /&gt;
: The  invokes further {{w|technobabble}} to suggests using a magnetised {{w|centreboard|retractable keel}} to adjust the nature of the forces. It conflates {{w|ocean current}}s (the global flow of water) and {{w|electric current}}s (the movement of charged particles). Perhaps from the supposed ability to move the magnet through the charge, as opposed to the other way round. It invokes the &amp;quot;Laplace force&amp;quot;, which is just a {{w|Lorentz force#Force on a current-carrying wire|technical variation}} of the Lorentzian one.&lt;br /&gt;
&lt;br /&gt;
=== How it actually works ===&lt;br /&gt;
[[File:Forces on sails for three points of sail.jpg|thumb|An indication of the forces on a sailboat in various directions relative to the wind direction. V&amp;lt;sub&amp;gt;T&amp;lt;/sub&amp;gt; is the true velocity of the wind, V&amp;lt;sub&amp;gt;A&amp;lt;/sub&amp;gt; is the apparent velocity, as seen by the moving boat. Various forces (F) arise from the way the wind hits the sail, which translate into the forward velocity of the boat, V&amp;lt;sub&amp;gt;B&amp;lt;/sub&amp;gt;.]] The actual manner of how a boat is able to sail into the wind relies upon the way the wind hits the boat's angled (and curved) sail, producing forces that are divided between those in the direction the boat is heading and perpendicular to it. Sideways forces encounter resistance from the water, leaving a net motion forward, a direction through the water by which a boat hull is designed to more easily pass. This allows a boat to sail at an angle into the wind (though not directly into it), with the right use of sails. The same effect also allows you to travel faster ''with'' the wind, at a slight angle away from its direction, than if you just ran exactly in its direction; using the sail square on will limit you to going no faster (and usually significantly slower than) the wind that you are relying upon to push you, whereas an angled sail and boat track can convert the forces into greater speed than even the following wind.&lt;br /&gt;
&lt;br /&gt;
Your speed of sailing perpendicular to the wind tends to be greater than that which you can achieve heading at any angle into the wind, but this is no use if you wish to sail to a destination directly where the wind is coming from. Aiming at an angle into the wind and {{w|Tacking (sailing)|tacking}} (briefly use your existing speed to turn directly across the wind), lets you combine sets of aiming off to slightly one side of the wind and doing the same slightly to the other, as required to reach your destination. The expert sailor can choose the {{w|point of sail}} to the wind that makes for the fastest journey time, combining the possible speed and the necessary amount of additional distance. Similarly, turns ('{{w|jibe}}s') across the wind allow a more optimal passage to a directly downwind destination than running straight with it.&lt;br /&gt;
&lt;br /&gt;
Supposing that the comic physics ''had'' been more capable of doing what it suggests, tacking/gibing could also be important concepts. With two sails made of different materials, one could unfurl that which is able to accumulate a positive charge (by losing electrons) or else another that accumulates a negative charge (by 'borrowing' electrons from the air). In this way, you could account for how the effective direction (and {{w|Magnetic declination|declination}}) of the magnetic field would be different for any given location, wind direction and intended destination and ''perhaps'' eventually make progress in whichever direction the vessel is required to go.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Four panels show a schematic sailboat, seen from above, to indicate how it can sail into the wind. In the first panel the boat is heading straight up in the panel. The sail is fixed at the bow and describes a slight curve going to the right of the boat and then curving to the left, ending close to the stern. The rudder can be seen behind the boat. Five arrows, pointing towards 4:30 on a clock face, are drawn at the top left part of the boat, indicating the direction of the wind. There is a frame above the drawing of the boat with text. And then the arrows are labeled, and small lines going to the sail and the hull of the boat connects with two more labels:]&lt;br /&gt;
:How sailboats use physics to sail upwind:&lt;br /&gt;
:Wind&lt;br /&gt;
:Boat&lt;br /&gt;
:Sail&lt;br /&gt;
&lt;br /&gt;
:[In the second panel the boat is drawn similar to panel 1, but the wind arrows have been changed to showing how the wind now blows past the sail on either side. This is done with two lines of three arrows that goes on either side of the sail, and the second and third arrow bends to follow the curve of the sail. Charged ions are shown across both sides of the sail with positive on the left side of the sail, (over the hull of the boat) and negative on the right side, over the sea to the right and behind the boat. The positive charges are small + signs in circles and the negative minus signs in circles. Above the drawing there is the following text:]&lt;br /&gt;
:1. Wind passing over the sail strips away electrons via the triboelectric effect.&lt;br /&gt;
&lt;br /&gt;
:[In the third panel the boat has turned towards right and has been moved closer to the bottom of the panel (this could be to acomodate more text above though). The entire hull is now covered in positive charges. A large broad dashed vector is shown going in the direction of the wind. The arrow is not over the boat but on either side of it, with the arrow head ending right of the stern of the boat. Two thin arrows are shown above the end of the force vector. A short solid arrow, that points along the same direction as the large arrow. And then a dashed arrow is drawn perpendicular to the first of these thin arrows (pointing along 1:30 on a clock face. Above the drawing there is the following text:]&lt;br /&gt;
:2. The positively charged boat is blown downwind; its movement in Earth's magnetic field produces a Lorentz force.&lt;br /&gt;
&lt;br /&gt;
:[In the fourth panel the boat has turned even more towards right and is back to the same height in the panel as the first two panels. The entire hull is still covered in positive charges. The broad dashed vector is still shown, but after starting in the wind direction it can be seen to turn slightly upwards before reaching the boat. And then when it comes out the other side of the boat it points in the direction of the bow of the boat, the arrow ending in front and a bit to the right of the boat. The two thin arrows from before are now shown to the left of the boat , with the short solid arrow pointing along the same direction as the start of the large arrow. And then a the dashed arrow drawn perpendicular to the first of these thin arrows pointing in the direction the boat is sailing. Above the drawing there is the following text:]&lt;br /&gt;
:3. The Lorentz force acts perpendicular to the direction of motion, redirecting the boat upwind.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:Physics]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3065:_Square_Units&amp;diff=382830</id>
		<title>3065: Square Units</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3065:_Square_Units&amp;diff=382830"/>
				<updated>2025-07-30T04:12:42Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Table of conversions */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3065&lt;br /&gt;
| date      = March 19, 2025&lt;br /&gt;
| title     = Square Units&lt;br /&gt;
| image     = square_units_2x.png&lt;br /&gt;
| imagesize = 545x678px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = The biggest I've seen in a published source in the wild is an 80-fold error in a reported distance, which I think came from a series of at least three unit conversions and area/length misinterpretations.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
&lt;br /&gt;
In this comic, [[Megan]] is using her phone to read about an insect species that consumes (hyperbolically described as 'devours') one square inch of grass per day. As it is relayed through a chain of conversations, this measurement gets misinterpreted up to 12 times until [[Hairbun]] tells other people that it devours an area of grass equal to two times the land area of Australia per day, which is clearly impossible by one insect.{{citation needed}} This is similar to the premise of [[2585: Rounding]].&lt;br /&gt;
&lt;br /&gt;
This gross error is the result of repeatedly misinterpreting the number of square units as the side length of a square, thus increasing the described area by the power of two. The chain also involves converting between {{w|imperial units}} and {{w|International System of Units|SI}} units, thus introducing smaller rounding errors, and frequently switching which measurement is &amp;quot;a single square with sides of a certain distance&amp;quot; and which is &amp;quot;the number of squares that are each of unit length&amp;quot;. The upshot is that, while each statement has two (or more) roughly similar measurements of area, the chain of misunderstanding ends up escalating to ever larger relative expanses. The later participants in this chain also clearly forget to sanity-check their figures, blithely informing others that an individual insect is effectively consuming impossibly huge quantities of food, and traveling enormous linear distances every day to do so. In fact, assuming the insect could continuously eat a 1cm strip of grass, it would need to travel at (2,500 miles)&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; / 1cm / 24 hours = 1.87×10&amp;lt;sup&amp;gt;7&amp;lt;/sup&amp;gt; km/s, which is about 62 times the speed of light.&lt;br /&gt;
&lt;br /&gt;
In the final frame, [[Blondie]] further misinterprets the comparative 'area of Australia' to mean the ''actual'' land mass of Australia, with the notional insect entirely defoliating the country twice a day, presumably of whatever had managed to grow within each 12 hour cycle. This would quickly kill off a large proportion of the vegetation, leading to a decreasing food supply for the insect.&lt;br /&gt;
&lt;br /&gt;
The title text tells us that [[Randall]] once found an 80-fold error in a reported distance in a published source. However, it is left as an exercise for the reader to figure out which one. In imperial units, a mile is equal to 80 {{w|chain (unit)|chain}}s, but the 80-fold error was likely due to a different chain of at least three unit conversions and area/length misinterpretations.&lt;br /&gt;
&lt;br /&gt;
===Table of conversions===&lt;br /&gt;
Dark red to light red shows a decrease in size due to inaccurate conversion, dark green to light green shows an increase in size.&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
! Step !! Multiplier !! Total multiplier !! Square inch !! Square cm !! Square foot !! Acre !! Square meters !! Square kilometers !! Square miles&lt;br /&gt;
|-&lt;br /&gt;
! 1&lt;br /&gt;
| N/A || 100% ||style=&amp;quot;background-color:lightgreen;&amp;quot;| 1||style=&amp;quot;background-color:red;&amp;quot;| 6.4516 || 0.006945 || 1.594e-7 || 0.0006451 || 6.451e-10 || 2.490e-10&lt;br /&gt;
|-&lt;br /&gt;
! 2&lt;br /&gt;
| 0.93 || 0.93 || 0.93 ||style=&amp;quot;background-color:pink;&amp;quot;| 6 || 0.006458 || 1.482e-7 || 0.0006 || 6e-10 || 2.316e-10&lt;br /&gt;
|-&lt;br /&gt;
! 3&lt;br /&gt;
| 6.00 || 5.58 || 5.58 ||style=&amp;quot;background-color:lightgreen;&amp;quot;| 36 (6&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;)||0.03875 ||  8.895e-7 || 0.0036 || 3.6e-9 || 1.39e-9&lt;br /&gt;
|-&lt;br /&gt;
! 4&lt;br /&gt;
| 36.00 || 200.90 || 200.9 ||style=&amp;quot;background-color:lightgreen;&amp;quot;|1,296 (36&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;) || style=&amp;quot;background-color:red;&amp;quot;|1.395 || 3.202e-5 || 0.1296 || 1.296e-7 || 5.004e-8&lt;br /&gt;
|-&lt;br /&gt;
! 5&lt;br /&gt;
| 0.72 || 144.00 || 144 || style=&amp;quot;background-color:red;&amp;quot;|929.03 || style=&amp;quot;background-color:pink;&amp;quot;|1 || 2.296e-5 || 0.09290 || 9.290e-8 || 3.587e-8&lt;br /&gt;
|-&lt;br /&gt;
! 6&lt;br /&gt;
| 0.97 || 139.50 || 139.5 || style=&amp;quot;background-color:pink;&amp;quot;|900|| 0.9688 || 2.224e-5 || 0.09 ||9e-8 || 3.475e-8&lt;br /&gt;
|-&lt;br /&gt;
! 7&lt;br /&gt;
| 90,000.00 || 125,550.25 || 125,550.25 || style=&amp;quot;background-color:lightgreen;&amp;quot;|810,000 (900&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;)|| style=&amp;quot;background-color:green;&amp;quot;|871.9||0.02002 ||  81||8.1e-5 || 3.127e-5&lt;br /&gt;
|-&lt;br /&gt;
! 8&lt;br /&gt;
| 1.032 || 129,600 || 129,600 || 836,127||style=&amp;quot;background-color:lightgreen;&amp;quot;| 900 (30&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;) ||0.02066||  83.61||8.361e-5 || 3.228e-5&lt;br /&gt;
|-&lt;br /&gt;
! 9&lt;br /&gt;
| 90,000.00 || 1.1,66e+8 || 1.166e+8 || 7.525e+8 ||style=&amp;quot;background-color:lightgreen;&amp;quot;| 810,000 (900&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;) || style=&amp;quot;background-color:green;&amp;quot;|18.59|| 7.525e+4 || 0.07525 || 0.02905&lt;br /&gt;
|-&lt;br /&gt;
! 10&lt;br /&gt;
| 1.076 || 1.255e+8 || 1.255e+8 || 8.094e+8|| 871,200||style=&amp;quot;background-color:lightgreen;&amp;quot;| 20|| style=&amp;quot;background-color:green;&amp;quot;|8.093e+4 || 0.08093 || 0.03125&lt;br /&gt;
|-&lt;br /&gt;
! 11&lt;br /&gt;
| 7,91e+6 || 9.920e+12 || 9.920e+12 || 6.4e+13|| 6.889e+13 || 1.581e+6 || style=&amp;quot;background-color:lightgreen;&amp;quot;| 6.4e+9 (80,000&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;) || 6,400 ||2,471&lt;br /&gt;
|-&lt;br /&gt;
! 12&lt;br /&gt;
| 1.00 || 9.920e+12 || 9.920e+12 || 6.4e+13|| 6.889e+13 || 1.581e+6 || 6.4e+9 || style=&amp;quot;background-color:lightgreen;&amp;quot;|6,400 (80&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;) ||style=&amp;quot;background-color:green;&amp;quot;|2,471&lt;br /&gt;
|-&lt;br /&gt;
! 13&lt;br /&gt;
| 253,128 || 2.509e+16 || 2.509e+16|| 1.618e+17 || 1.7424e+14|| 4.000e12 || 1.619e+13 || 1.618e+7 || style=&amp;quot;background-color:lightgreen;&amp;quot;|6.250e+6 (2,500&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;)&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
The total area of Australia is 7,688,287 km² or 2,968,464 mi², making it the 6th largest country on Earth by area. A 2,500-mile square would actually be about 2.1 times greater than the land area of Australia, once again having a rounding error.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Describe the layout of panels and arrows.}}&lt;br /&gt;
:[Arrows point to each consecutive panel.]&lt;br /&gt;
&lt;br /&gt;
:[Megan is looking at her phone, with Cueball standing next to her.]&lt;br /&gt;
:Megan: This newly-described insect can devour up to a square inch of grass per day.&lt;br /&gt;
:Cueball: Oh, neat.&lt;br /&gt;
&lt;br /&gt;
:[Cueball is speaking to Ponytail.]&lt;br /&gt;
:Cueball: ...it eats a square inch, or 6 cm², of grass per day...&lt;br /&gt;
&lt;br /&gt;
:[Ponytail is speaking to Hairy.]&lt;br /&gt;
:Ponytail: ...a 6-centimeter (2½ inch) square of grass, or 36 cm²...&lt;br /&gt;
&lt;br /&gt;
:[Arrows now point to each consecutive conversion.]&lt;br /&gt;
:Written out of panel: ...a 36 centimeter square, or over a square foot...&lt;br /&gt;
:Written out of panel: ...a square foot, or 900 cm²...&lt;br /&gt;
:Written out of panel: ...a 900 cm (30 foot) square...&lt;br /&gt;
:Written out of panel: ...a 30 foot square of grass (900 square feet)...&lt;br /&gt;
:Written out of panel: ...a 900 foot square, or almost 20 acres...&lt;br /&gt;
:Written out of panel: ...20 acres (8 hectares, or 80,000 square meters)...&lt;br /&gt;
:Written out of panel: ...an 80,000 meter (80 km) square...&lt;br /&gt;
:Written out of panel: ...a square 80 km wide, or roughly 2,500 square miles...&lt;br /&gt;
:Written out of panel: ...a 2,500-mile square, or twice the land area of Australia, per day...&lt;br /&gt;
&lt;br /&gt;
:[An arrow points from the last conversion to the last panel.]&lt;br /&gt;
:[Hairbun is looking at her phone, with White Hat, Danish and Blondie standing next to her.]&lt;br /&gt;
:Hairbun: Did you hear about this insect that defoliates the entire land area of Australia twice a day?&lt;br /&gt;
:White Hat: Gosh!&lt;br /&gt;
:Danish: Wow.&lt;br /&gt;
:Blondie: I hope at least it's contained there...&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Animals]]&lt;br /&gt;
[[Category:Math]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Comics featuring Hairy]]&lt;br /&gt;
[[Category:Comics featuring Hairbun]]&lt;br /&gt;
[[Category:Comics featuring White Hat]]&lt;br /&gt;
[[Category:Comics featuring Danish]]&lt;br /&gt;
[[Category:Comics featuring Blondie]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3091:_Renormalization&amp;diff=382829</id>
		<title>3091: Renormalization</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3091:_Renormalization&amp;diff=382829"/>
				<updated>2025-07-30T04:11:10Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3091&lt;br /&gt;
| date      = May 19, 2025&lt;br /&gt;
| title     = Renormalization&lt;br /&gt;
| image     = renormalization_2x.png&lt;br /&gt;
| imagesize = 221x345px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Applying renormalization to bullies successfully transformed Pete &amp;amp; Pete's Endless Mike into Finite Mike.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{w|Renormalization}} is a mathematical toolkit used in quantum field theory and other domains of physics. The concept is mathematically and intuitively complex and {{w|Renormalization#Attitudes_and_interpretation|controversial}}. Briefly, renormalization techniques permit the replacement of terms in equations that represent postulated initial attributes  of a thing (e.g., mass and charge values of an electron) with terms that reference attributes observed experimentally. Renormalization is presumed to account for unobserved interactions among the things in the system being studied that lead to the state of the renormalized thing being different from what was initially postulated, and it can therefore be considered justified and not a {{w|Fudge_factor|fudge factor}}. Equations with renormalized quantities reach finite solutions that can be used to do additional work, whereas those without renormalized quantities reach non-finite (infinite) solutions that cannot. &lt;br /&gt;
&lt;br /&gt;
Many common examples of calculations that require renormalization are those related to self-interactions of particles. For example an electron may interact with itself by emitting and re-absorbing a (virtual) photon. A naive calculation of the “probability” of this event produces an infinite result. Renormalization is used to extract a meaningful finite answer. We find that the true state of an electron at any given time includes a component which corresponds to this emission-and-reabsorption process. There are many interpretations of these results, but one common description is that the electron is repeatedly emitting and reabsorbing a photon, i.e. “hitting itself”.&lt;br /&gt;
&lt;br /&gt;
The comic invokes the commonplace {{tvtropes|StopHittingYourself|'stop hitting yourself'}} trope, in which the bully (Cueball) grabs a body part of the victim and perpetrates an assault with it, while claiming that the victim is engaged in self-harm. Use of this trope references the self-interactions that renormalization is accounting for. Megan's &amp;quot;... Wait&amp;quot; represents her starting to get the idea of renormalization, inspired by Cueball's bullying of the electron, as described in the caption.&lt;br /&gt;
&lt;br /&gt;
Another possible interpretation is that the earliest renormalization techniques amounted to attempts by physicists to &amp;quot;bully&amp;quot; electrons into accepting self-descriptions that gave the physicists the answers they sought. &lt;br /&gt;
&lt;br /&gt;
The title text refers to the character &amp;quot;Endless&amp;quot; Mike Hellstrom, from the 1989 TV sitcom ''{{w|The Adventures of Pete &amp;amp; Pete#Enemies|The Adventures of Pete &amp;amp; Pete}}''. It links back to renormalization, because renormalization lets you remove infinities to get finite solutions, so in that sense it would turn Endless Mike into Finite Mike.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
: [Cueball poking an atom. Megan looks at it with a hand on her chin]&lt;br /&gt;
: Cueball: ''Hey, electron!''&lt;br /&gt;
: Cueball: ''Stop hitting yourself!''&lt;br /&gt;
: Cueball: ''Stop hitting yourself!''&lt;br /&gt;
: Megan: ...Wait.&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
: Renormalization actually started out as an effort to bully electrons.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&amp;lt;noinclude&amp;gt;&lt;br /&gt;
[[Category:Physics]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Category:Tips&amp;diff=381868</id>
		<title>Category:Tips</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Category:Tips&amp;diff=381868"/>
				<updated>2025-07-24T17:38:18Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;[[:Category:Protip|Protip]] came first, but since then there have been all kinds of protip that have not been named protip directly.&lt;br /&gt;
&lt;br /&gt;
'''Click''' to expand for a more detailed explanation:&lt;br /&gt;
&amp;lt;div class=&amp;quot;mw-collapsible mw-collapsed leftAlign&amp;quot; style=&amp;quot;width:100%&amp;quot;&amp;gt;&lt;br /&gt;
&amp;lt;br&amp;gt;&lt;br /&gt;
This category is similar to [[:Category:Protip]], [[:Category:How to annoy]], [[:Category:Facts]], and [[:Category:Fun fact]]. &lt;br /&gt;
&lt;br /&gt;
The comic [[1215: Insight]] doesn't mention the word tip, even though it is one. And the comic [[2890: Relationship Advice]] is called advice but could have been a tip.&lt;br /&gt;
&lt;br /&gt;
[[:Category:Science tip|Science tips]] have been used more than once and have their own category. There were also two [[2400: Statistics|Statistics tip]] that were released as two tips comics in a row once, but the second one was just called a [[2435: Geothmetic Meandian|Stats tip]]. Since they were not named the same they are both listed here below.&lt;br /&gt;
&lt;br /&gt;
So far, there have been the following one time only tips:&lt;br /&gt;
#[[897: Elevator Inspection|Industry tip]]&lt;br /&gt;
#[[995: Coinstar|Holiday tip]]&lt;br /&gt;
#[[1077: Home Organization|Home organization tip]]&lt;br /&gt;
#[[1567: Kitchen Tips|Kitchen tips]] &lt;br /&gt;
#[[1696: AI Research|AI tip]]&lt;br /&gt;
#[[1715: Household Tips|Household tips]]&lt;br /&gt;
#[[1754: Tornado Safety Tips|Tornado safety tips]]&lt;br /&gt;
#[[1820: Security Advice|Security tips]]&lt;br /&gt;
#[[1829: Geochronology|Geology tip]]&lt;br /&gt;
#[[1855: Telephoto|Telephoto tip]]&lt;br /&gt;
#[[2173: Trained a Neural Net|Engineering tip]]&lt;br /&gt;
#[[2213: How Old|Interaction tip]]&lt;br /&gt;
#[[2260: Reaction Maps|Texting tip]]&lt;br /&gt;
#[[2400: Statistics|Statistics tip]]&lt;br /&gt;
#[[2435: Geothmetic Meandian|Stats tip]]&lt;br /&gt;
#[[2483: Linked List Interview Problem|Coding interview tip]]&lt;br /&gt;
#[[2499: Abandonment Function|Tech tip]]&lt;br /&gt;
#[[2526: TSP vs TBSP|Cooking tip]]&lt;br /&gt;
#[[2566: Decorative Constants|Math tip]]&lt;br /&gt;
#[[2649: Physics Cost-Saving Tips|Physics cost-saving tips]]&lt;br /&gt;
#[[2651: Air Gap|Energy tip]]&lt;br /&gt;
#[[2657: Complex Vowels|Linguistics tip]]&lt;br /&gt;
#[[2662: Physics Safety Tip|Physics Safety tip]]&lt;br /&gt;
#[[2671: Rotation|Phone tip]]&lt;br /&gt;
#[[2812: Solar Panel Placement|Solar energy tip]]&lt;br /&gt;
#[[2863: Space Typography|Space tip]]&lt;br /&gt;
#[[2864: Compact Graphs|Design tip]]&lt;br /&gt;
#[[2882: Net Rotations|Spacetime health tip]]&lt;br /&gt;
#[[3017: Neutrino Modem|Networking tip]]&lt;br /&gt;
#[[3043: Muons|Physics tip]]&lt;br /&gt;
#[[3093: Drafting|Aerospace tip]]&lt;br /&gt;
#[[3119: Flettner Rotor|Sailing tip]]&lt;br /&gt;
&amp;lt;/div&amp;gt;&lt;br /&gt;
&amp;lt;br&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics by topic]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3058:_Tall_Structures&amp;diff=367837</id>
		<title>3058: Tall Structures</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3058:_Tall_Structures&amp;diff=367837"/>
				<updated>2025-03-04T10:51:22Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3058&lt;br /&gt;
| date      = March 3, 2025&lt;br /&gt;
| title     = Tall Structures&lt;br /&gt;
| image     = tall_structures_2x.png&lt;br /&gt;
| imagesize = 740x430px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Briefly set a new record for tallest human-made structure by getting my knit sweater snagged on the skydiving plane door as I jumped and not noticing until I'd landed.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BOT ON TOP OF A SPACE ELEVATOR - Add a table of heights for each structure - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
This is a comparison of various tall buildings and structures, ranging from a {{w|pyramid of Giza}} to the {{w|Burj Khalifa}}. [[Randall]]'s definition of a structure apparently takes from amongst those artificial objects that have continuous extent from the ground to some height.&lt;br /&gt;
&lt;br /&gt;
The buildings are sorted by height. The tallest structure (under Randall's terms) is an {{w|aerostat}} balloon, which significantly exceeds the height of the Burj Khalifa.&lt;br /&gt;
&lt;br /&gt;
An aerostat is a lighter-than-air aircraft that can be tethered to the ground. This is the main joke of the comic, since as long as it is tethered to the ground and is higher than the Burj Khalifa, it could be considered the tallest man-made structure. The comic doesn't accurately depict the world record for how high tethered aerostats can actually fly (4880&amp;amp;nbsp;meters, achieved on 23 September 2014, close to 6 times the height of Burj Khalifa), which would either dwarf the other buildings or make the comic very tall, but since it is just some random aerostat flying at that time that is shown, this may be at a much lower height.&lt;br /&gt;
&lt;br /&gt;
The joke in the title text is that Randall once skydived out of an airplane wearing a knit sweater. The sweater caught on the airplane door, and presumably unraveled as he descended. When he reached the ground, the long thread that extended up to the plane (typically 8,000 to 14,000 feet above the ground) set a temporary record for the tallest structure. This is not realistically feasible, since knit tops usually only use around 1000 m (3280 ft) of yarn if knit using thin fingerling weight yarn. However, a sweater knit at a T-shirt density could in fact use over 2000 m (6561 ft) of yarn, which (assuming it hasn't started felting) is enough to extend to skydiving height.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[Labels below structures shown in a black silhouette, from left to right, shortest to tallest:]&lt;br /&gt;
:The Great Pyramid (Giza)&lt;br /&gt;
:The Shard (London)&lt;br /&gt;
:The Eiffel Tower (Paris)&lt;br /&gt;
:The Empire State Building (New York)&lt;br /&gt;
:The CN Tower (Toronto)&lt;br /&gt;
:The Clock Towers (Mecca)&lt;br /&gt;
:KRDK-TV Mast (North Dakota)&lt;br /&gt;
:Shanghai Tower&lt;br /&gt;
:Tokyo Skytree&lt;br /&gt;
:Merdeka 118 (Kuala Lumpur)&lt;br /&gt;
:Burj Khalifa (Dubai)&lt;br /&gt;
:Some random aerostat that happens to be operating today&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:The Burj Khalifa is the world's tallest artificial structure, but only on days when no one is flying a high-altitude balloon aerostat.&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
===Tall structures left out===&lt;br /&gt;
*This comic could use Ostankino Tower built in 1966 because it features KRDK TV mast.&lt;br /&gt;
**Pros: &lt;br /&gt;
***The 1966 tower is 533m tall, *almost* as tall as CN tower&lt;br /&gt;
***Much, much sharper shape (it's so sharp it's closer to KRDK TV mast in shape than CN Tower - all while it's a freestanding structure)&lt;br /&gt;
**Cons: &lt;br /&gt;
***Its silhouette does not match the typical image of a &amp;quot;huge rocket ready to go to space&amp;quot; &lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3038:_Uncanceled_Units&amp;diff=363581</id>
		<title>3038: Uncanceled Units</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3038:_Uncanceled_Units&amp;diff=363581"/>
				<updated>2025-01-26T14:41:16Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3038&lt;br /&gt;
| date      = January 15, 2025&lt;br /&gt;
| title     = Uncanceled Units&lt;br /&gt;
| image     = uncanceled_units_2x.png&lt;br /&gt;
| imagesize = 323x355px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Speed limit c arcminutes^2 per steradian&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
Another of [[Randall]]'s [[:Category:Pet Peeves|pet peeves]], this comic expresses disapproval of units that could be mathematically simplified (in other words, the 'uncanceled' of the title refers to mathematical cancellation, not cancellation by a body, like how SI supplanted the CGS system with MKS).&lt;br /&gt;
&lt;br /&gt;
[[White Hat]] is presenting a refrigerator to [[Cueball]], saying it uses 3 kWh per day. This is a common and useful way to report power usage. But mathematically, the units can be simplified because there are two time units that cancel each other:&lt;br /&gt;
&lt;br /&gt;
: 3 kWh per day = 3 kW * 1 hour / 1 day = 3 kW * (1 hour / 24 hours) = 0.125 kW = 125 W&lt;br /&gt;
&lt;br /&gt;
This gives the (average) power usage in {{w|watts}} (a unit for the rate of energy transfer, equal to 1 {{w|joule}} per second).&lt;br /&gt;
&lt;br /&gt;
The reason people would use &amp;quot;kWh / day&amp;quot; without simplifying the unit is that kWh is a commonly used unit for energy, and it's often viewed as a base unit even though it's composite (1 kWh is the amount of energy consumed by one kilowatt of power usage over one hour, and is equal to 1 kJ/s * 1 h = 3600 kJ). It's the unit in which energy consumption is typically reported and in which bills are calculated, so it's more familiar to the average consumer, and giving the power usage in kWh / day makes it easier for the consumer to understand how much money it will cost them to run per day. Also, &amp;quot;per day&amp;quot; makes it clear that this is the ''average'' power usage rather than the maximum power usage (they are different because refrigerators cycle on and off throughout the day). But mathematically, &amp;quot;kWh / day&amp;quot; is inelegant, because it uses power (which is already a measure of energy per time) multiplied by a time unit then divided by another time unit.&lt;br /&gt;
&lt;br /&gt;
Cueball (probably representing Randall) sardonically wonders whether the refrigerator would fit in his kitchen, since the ceiling is only 50 gallons per square foot high. This is clearly an abnormal and unhelpful way of reporting height. This unit turns a normal measurement of height (feet and inches in the US; meters and centimeters most other places) into a weird collection of uncancelled units. Gallons can be transformed to cubic feet (1 US gal = 231 in&amp;lt;sup&amp;gt;3&amp;lt;/sup&amp;gt;), which can be divided by the square feet, yielding a ceiling height of around 6 feet 8 inches, or 203.7 cm. (Using imperial gallons [1 UK gal ≈ 277.42 in&amp;lt;sup&amp;gt;3&amp;lt;/sup&amp;gt;&amp;lt;!--exactly equal to 4.54609 L--&amp;gt;], the height is roughly 8 feet, or approximately 244.7 cm.) This is intended to lampoon the use of both non-metric and uncancelled units by showing how odd things become if they're generally used.&lt;br /&gt;
&lt;br /&gt;
The exact ceiling height in feet, assuming the US gallon is used, can be calculated as:&lt;br /&gt;
&lt;br /&gt;
: 50 gallons per square foot = 50 gal * 231 in&amp;lt;sup&amp;gt;3&amp;lt;/sup&amp;gt;/gal * (1/12 ft/in)&amp;lt;sup&amp;gt;3&amp;lt;/sup&amp;gt; / 1 ft&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; = 6.68 ft = 6 ft 8 in&lt;br /&gt;
&lt;br /&gt;
This can be understood as &amp;quot;the height such that every square foot of ceiling has 50 gallons under it.&amp;quot; ''[[what if? (blog)|what if?]]'': [https://what-if.xkcd.com/11/ Droppings] also covers strange instances of unit cancellation, including a measure of volume per distance converted to area; similar to Cueball's measure of volume per area representing a distance (the height of his ceiling).&amp;lt;!-- This may not be relevant enough to keep --&amp;gt;&lt;br /&gt;
&lt;br /&gt;
A common source of unit drama occurs between lay people who are looking for everyday practicality and science/engineering types who are inclined towards formalized mathematical operations. For example U.S. customary units which support many divisibility rules (1 foot = 12 inches; 1 inch = 72 points = 1440 twips; 3 feet = 1 yard; 2 yards = 1 fathom; 22 yards = 1 chain; 10 chains = 1 furlong; 1 mile = 5280 feet; 1 league = 3 miles) versus metric units which prioritize base 10 scales. In this case, telling the average customer the energy use in joules per day or average consumption in watts would require them to perform more complicated conversions to get to the figure they actually care about — the actual cost per day. White Hat could just give this cost figure directly, but does not know what every customer pays for electricity (an explicit yearly cost estimate would be included on the government-required energy efficiency label).&lt;br /&gt;
&lt;br /&gt;
In the title text, a speed limit is given as c arcminutes&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; per steradian, where c is presumably the speed of light in a vacuum — 2.998×10&amp;lt;sup&amp;gt;8&amp;lt;/sup&amp;gt; m/s (meters per second) or 186282 mi/s (miles per second). A steradian (sr) is the SI unit for solid angle, subtended by a section of a sphere (like a radian is a unit of angle subtended by a section of a circle). A square arcminute is also a unit of solid angle, equivalent to a section of a sphere of 1/60 of a degree by 1/60 of a degree. There are ((1/60)*(π/180))&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; = 8.462×10&amp;lt;sup&amp;gt;-8&amp;lt;/sup&amp;gt; sr in a square arcminute. Then multiplying by c gives a speed of 56.75 mph (probably 55 mph, based upon the {{w|National Maximum Speed Law|'traditional' US speed limit}}, before rounding errors in the reverse direction), or 91.33 km/h, showing that you can combine an outrageously high speed with two unnecessary units that cancel each other to form a normal road speed.&lt;br /&gt;
&lt;br /&gt;
It is worth noting that, although some of these examples are ridiculous, there are cases where uncancelled units can be helpful to understanding the concept. For example, while the {{w|Hubble's law|Hubble Parameter}} can be expressed as 2.17132212 × 10&amp;lt;sup&amp;gt;-18&amp;lt;/sup&amp;gt; {{w|Hz}}, expressing it as 67 km/s/Mpc directly relates the quantity to how it is measured and its natural interpretation. Another example would be fuel efficiency in cars, where mi/gal and km/l technically simplify to 1/area, but expressing it in volume and distance allows easy estimations of range and travel cost, while mm&amp;lt;sup&amp;gt;-2&amp;lt;/sup&amp;gt; or in&amp;lt;sup&amp;gt;-2&amp;lt;/sup&amp;gt; would require significant unit conversions. Another example might be the units of the gravitational constant G, ~6.674 × 10&amp;lt;sup&amp;gt;-11&amp;lt;/sup&amp;gt; m&amp;lt;sup&amp;gt;3&amp;lt;/sup&amp;gt;/(kg×s&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;), which might be written as (m/s&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;)/(kg/m&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;), although this only involves unjumbling rather than uncancelling units.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[White Hat and Cueball are standing to either side of a refrigerator. White Hat is lifting one hand up to touch the side of the fridge. The fridge has two compartments, with two doors that open to the top compartment and one bottom compartment, a drawer. The top left compartment has a tall handle on its right, the top right compartment has a tall handle on its left, and the bottom compartment has a long handle on its top. The top left compartment has an oval shape on the top and a paper attached, both with unreadable text. There is also a small square note in the top right corner and an oval shape on the side of the fridge above White Hat. These also have unreadable text.]&lt;br /&gt;
:White Hat: This fridge uses only 3 kWh per day!&lt;br /&gt;
:Cueball: But will it fit in my kitchen? The ceiling there is only 50 gallons per square foot.&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Pet peeve: Uncanceled units&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Pet Peeves]]&lt;br /&gt;
[[Category:Comics featuring White Hat]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Math]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=605:_Extrapolating&amp;diff=363544</id>
		<title>605: Extrapolating</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=605:_Extrapolating&amp;diff=363544"/>
				<updated>2025-01-25T14:02:38Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 605&lt;br /&gt;
| date      = July 3, 2009&lt;br /&gt;
| title     = Extrapolating&lt;br /&gt;
| image     = extrapolating.png&lt;br /&gt;
| titletext = By the third trimester, there will be hundreds of babies inside you.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic is a joke about the incorrect application of {{w|linear extrapolation}}. By connecting two points without any context, we can come up with incredibly funny and absurd results. Here, connecting a bride's number of spouses yesterday (zero) and today—her wedding day—(one) can result in a linear extrapolation to hundreds of spouses a year. Cueball presents the accumulation of husbands as though it were a phenomenon beyond the bride's ability to control. Using similar points for pregnancy (yesterday: no babies, today: one), we can get 200+ children inside a single person by the seventh month of pregnancy.&lt;br /&gt;
&lt;br /&gt;
This is another comic in the infrequent [[:Category:My Hobby|My Hobby]] series.&lt;br /&gt;
&lt;br /&gt;
This particular hobby has later been explored in [[1007: Sustainable]], [[1204: Detail]], [[1281: Minifigs]], [[2892: Banana Prices]] and [[3042: T. Rex Evolution]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:My Hobby: Extrapolating&lt;br /&gt;
&lt;br /&gt;
:[There is a graph. Time runs along the horizontal axis; Number of Husbands on the vertical graph. Yesterday and today are labeled in time, 0 and 1 in number of husbands. Points are plotted with 0 at yesterday, 1 at today. A straight line is fitted through them.]&lt;br /&gt;
:[Cueball is holding a pointer to the graph, and looking at Megan wearing a bridal train and veil.]&lt;br /&gt;
:Cueball: As you can see, by late next month you'll have over four dozen husbands.&lt;br /&gt;
:Cueball: Better get a bulk rate on wedding cake.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics with babies]]&lt;br /&gt;
[[Category:Line graphs]]&lt;br /&gt;
[[Category:My Hobby]]&lt;br /&gt;
[[Category:Wedding]]&lt;br /&gt;
[[Category:Extrapolation]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=605:_Extrapolating&amp;diff=363543</id>
		<title>605: Extrapolating</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=605:_Extrapolating&amp;diff=363543"/>
				<updated>2025-01-25T14:02:03Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 605&lt;br /&gt;
| date      = July 3, 2009&lt;br /&gt;
| title     = Extrapolating&lt;br /&gt;
| image     = extrapolating.png&lt;br /&gt;
| titletext = By the third trimester, there will be hundreds of babies inside you.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic is a joke about the incorrect application of {{w|linear extrapolation}}. By connecting two points without any context, we can come up with incredibly funny and absurd results. Here, connecting a bride's number of spouses yesterday (zero) and today—her wedding day—(one) can result in a linear extrapolation to hundreds of spouses a year. Cueball presents the accumulation of husbands as though it were a phenomenon beyond the bride's ability to control. Using similar points for pregnancy (yesterday: no babies, today: one), we can get 200+ children inside a single person by the seventh month of pregnancy.&lt;br /&gt;
&lt;br /&gt;
This is another comic in the infrequent [[:Category:My Hobby|My Hobby]] series.&lt;br /&gt;
&lt;br /&gt;
This particular hobby has later been explored in [[1007: Sustainable]], [[1204: Detail]], [[1281: Minifigs]], [[2892: Banana Prices]] and [[3042:T. Rex Evolution]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:My Hobby: Extrapolating&lt;br /&gt;
&lt;br /&gt;
:[There is a graph. Time runs along the horizontal axis; Number of Husbands on the vertical graph. Yesterday and today are labeled in time, 0 and 1 in number of husbands. Points are plotted with 0 at yesterday, 1 at today. A straight line is fitted through them.]&lt;br /&gt;
:[Cueball is holding a pointer to the graph, and looking at Megan wearing a bridal train and veil.]&lt;br /&gt;
:Cueball: As you can see, by late next month you'll have over four dozen husbands.&lt;br /&gt;
:Cueball: Better get a bulk rate on wedding cake.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics with babies]]&lt;br /&gt;
[[Category:Line graphs]]&lt;br /&gt;
[[Category:My Hobby]]&lt;br /&gt;
[[Category:Wedding]]&lt;br /&gt;
[[Category:Extrapolation]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3030:_Lasering_Incidents&amp;diff=361135</id>
		<title>3030: Lasering Incidents</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3030:_Lasering_Incidents&amp;diff=361135"/>
				<updated>2025-01-06T14:01:23Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3030&lt;br /&gt;
| date      = December 27, 2024&lt;br /&gt;
| title     = Lasering Incidents&lt;br /&gt;
| image     = lasering_incidents_2x.png&lt;br /&gt;
| imagesize = 444x479px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = I still don't know how the police found my compound where I ran an illegal searchlight depot/covert blimp airfield/fireworks testing range.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic is about pointing lasers at aircraft, which is a [https://www.faa.gov/about/initiatives/lasers#:~:text=Pointing%20a%20laser%20at%20an,%2430%2C800%20for%20multiple%20laser%20incidents. federal crime in the USA] because the powerful laser light could temporarily distract or blind the pilot, or cause burns and eye injuries if the laser is powerful enough. (This had been previously mentioned in [[2481: 1991 and 2021]].) It points out that when a laser is pointed at an aircraft, the pilot or anyone else on board can see a glowing line in the color of the laser exactly pinpointing the location of the perpetrator. Therefore, no one guilty of this crime should really be surprised when they are caught and fined or imprisoned. This comic might be a response to the {{w|2024 United States drone sightings}}, during which many people in New Jersey collectively forgot what a plane is and started pointing laser pointers at them.&lt;br /&gt;
&lt;br /&gt;
The title text parodies this kind of crime by describing a criminal activity which also points to itself, namely illegal fireworks testing, blimp airfield, and searchlight depot, all of which create large markers visible from the air.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[In a black panel there is a glowing green laser beam that starts in a green starburst at the lower right part and exits the panel near the upper left corner. Green text is written along the laser line and where the text ends a small green arrow is pointing to the starburst from where the laser light emanates.]&lt;br /&gt;
:&amp;lt;span style=&amp;quot;color:#32CD32&amp;quot;&amp;gt;Someone is committing a federal crime right here →&amp;lt;/span&amp;gt;&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:I don’t know why people who shine lasers at aircraft are surprised when the police catch them, given that the crime consists of drawing a giant glowing arrow in the sky pointing at your location.&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
The point of this comic has been previously addressed in [[Thing Explainer]].&lt;br /&gt;
:&amp;lt;b&amp;gt;POINT A GREEN LIGHT AT SPACE&amp;lt;/b&amp;gt;&lt;br /&gt;
:You can use a green light pointer to point out stars to your friends. When you do this, it looks really cool, like you're holding a stick that's touching a spot on the sky.&lt;br /&gt;
:Be very careful &amp;lt;i&amp;gt;never&amp;lt;/i&amp;gt; to point it at sky boats. It's against the law, and the police lock up many people every year for it. And if you try, you'll be easy to find, because of the bright green line pointing to you.&lt;br /&gt;
::&amp;lt;i&amp;gt;-The Sky At Night&amp;lt;/i&amp;gt;&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with inverted brightness]]&lt;br /&gt;
[[Category:Comics with color]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2811:_Free_Fallin%27&amp;diff=360103</id>
		<title>2811: Free Fallin'</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2811:_Free_Fallin%27&amp;diff=360103"/>
				<updated>2024-12-23T07:06:47Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2811&lt;br /&gt;
| date      = August 4, 2023&lt;br /&gt;
| title     = Free Fallin'&lt;br /&gt;
| image     = free_fallin_2x.png&lt;br /&gt;
| imagesize = 546x376px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Their crash investigation team had some particularly harsh words for Dave Matthews.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
The {{w|National Transportation Safety Board|National Transportation Safety Board}} (NTSB) issues reports on incidents involving various types of vehicles, including airplanes. In this comic, Randall suggests that due to an obscure law, the NTSB has to do a report if a song is downloaded to a {{w|Flight data recorder|flight data recorder}}. In this instance, the song used is the 1989 ballad {{w|Free Fallin'|&amp;quot;Free Fallin'&amp;quot;}} by {{w|Tom Petty|Tom Petty}}. Interpreting the song's lyrics as a description of an incident, the NTSB's report describes a flight over northern Los Angeles County, California. The pilot apparently takes off from his home in Reseda, gliding over Mulholland Drive, skywriting the name of his loved one, and then presumably either skydiving from the craft or turning off its power to achieve free fall. Assuming Tom Petty is the [amateur] solo pilot, either action would be a dangerous maneuver risking not only his vehicle but the lives of the civilians below, and quite possibly his own.&lt;br /&gt;
&lt;br /&gt;
The title text refers to the 1996 song &amp;quot;{{w|Crash Into Me}}&amp;quot;, off the {{w|Dave Matthews Band}}'s second album, ''{{w|Crash (Dave Matthews Band album)|Crash}}''. The investigation team likely would not enjoy a song which reminds them of their job, even if it was referring to love instead of planes.{{Citation needed}} They may also have ''some particularly harsh words for Dave Matthews'' if the song ''Crash Into Me'' was downloaded to a {{w|Flight data recorder|flight data recorder}}, which would, by the suggested obscure law, create a record of a crash that did not actually occur, making crash investigation difficult.&lt;br /&gt;
&lt;br /&gt;
Munroe is a &amp;quot;90s kid,&amp;quot; and both of these songs were in heavy rotation on the radio when he was a teenager —- an age when many people make especially emotional connections to the popular music of their era.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Map item !! Corresponding ''Free Fallin''' lyric&lt;br /&gt;
|-&lt;br /&gt;
| Tom Petty home || And it's a long day livin' in Reseda&lt;br /&gt;
|-&lt;br /&gt;
| vampires || And all the vampires walkin' through the valley&amp;lt;br /&amp;gt;Move west down Ventura Boulevard&lt;br /&gt;
|-&lt;br /&gt;
| boys (bad) || And all the bad boys are standin' in the shadows&lt;br /&gt;
|-&lt;br /&gt;
| girls (good) (sad) || And the good girls are home with broken hearts&lt;br /&gt;
|-&lt;br /&gt;
| glide phase || I wanna glide down over Mulholland&lt;br /&gt;
|-&lt;br /&gt;
| skywriting incident || I wanna write her name in the sky&lt;br /&gt;
|-&lt;br /&gt;
| ? || I'm gonna free fall out into nothin'&amp;lt;br /&amp;gt;Gonna leave this world for a while&amp;lt;br /&amp;gt;I'm free fallin'&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
Other item labels on the map, unrelated to the lyrics of the song, include Granada Hills, San Fernando, Sunland, Van Nuys, Burbank, and Hollywood.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[There is a map of San Fernando Valley, California, with a dotted line labeled “flight path” and several other features marked on and around the line. It must be assumed up is north, since there is no compass to indicate otherwise.]&lt;br /&gt;
:[The emblem and name of the National Transportation Safety Board (NTSB) are in the in top left.]&lt;br /&gt;
&lt;br /&gt;
:[The dotted line labeled &amp;quot;Flight path&amp;quot; moves as such:]&lt;br /&gt;
:* Circled X labeled Tom Petty home near the center of Reseda, moving down below Ventura Boulevard.&lt;br /&gt;
:* The words &amp;quot;Flight path&amp;quot; are drawn, with an arrow pointing towards the line.&lt;br /&gt;
:* As the line moves below Mulholland Drive, it starts moving right.&lt;br /&gt;
:* The words &amp;quot;Glide phase&amp;quot; point to the path as it goes up, crossing Mulholland and Ventura once more.&lt;br /&gt;
:* Three loops are in the path. The first is labelled &amp;quot;Skywriting incident&amp;quot;. It starts moving right here.&lt;br /&gt;
:* The flight path abruptly ends as an arrow pointing towards a question mark.&lt;br /&gt;
&lt;br /&gt;
:[There are some other features not directly correlated to the flight path.]&lt;br /&gt;
:Boys (Bad)&lt;br /&gt;
::There are 4 arrows coming out of this text. They all end up curving to go southwest.&lt;br /&gt;
:Girls (Good) (Sad)&lt;br /&gt;
::This is to the upper right of where the flight path starts. There are 7 arrows coming out of this text, heading straight.&lt;br /&gt;
:Vampires&lt;br /&gt;
::This is above Ventura Boulevard, in between the two times the flight path crosses Ventura. There are 3 &amp;quot;X&amp;quot;es in sequence on the road, and there is a single straight arrow above these, pointing along Ventura to the left.&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Due to an obscure law, if you download a song onto a flight data recorder and send it to the NTSB, they have to do a report on it.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Maps]]&lt;br /&gt;
[[Category:Songs]]&lt;br /&gt;
[[Category:Aviation]]&lt;br /&gt;
[[Category:Comics featuring real people]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3026:_Linear_Sort&amp;diff=360102</id>
		<title>3026: Linear Sort</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3026:_Linear_Sort&amp;diff=360102"/>
				<updated>2024-12-23T07:05:37Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3026&lt;br /&gt;
| date      = December 18, 2024&lt;br /&gt;
| title     = Linear Sort&lt;br /&gt;
| image     = linear_sort_2x.png&lt;br /&gt;
| imagesize = 385x181px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = The best case is O(n), and the worst case is that someone checks why.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
A common task to have computers do is to sort a list, such as from A to Z or from the smallest to the largest number. People have created dozens of algorithms for this task, from simple to complex, each with its own merits on ease of implementation, memory usage, and efficiency; to understand the last one, for this and all other uses of algorithms, computer scientists adopted {{w|Big O Notation}}. There are two aspects of Big O notation to know:&lt;br /&gt;
&lt;br /&gt;
1. It is ''asymptotic''; meaning that it simply expresses the base relation between the size of the list and the time needed to sort. O(2''n'') is written simply as O(''n''), because Big O is more concerned about indicating the sort time scaling linearly rather than accurately giving you a formula to calculate how long it'll take. Likewise, O(2&amp;lt;sup&amp;gt;''n''&amp;lt;/sup&amp;gt; + ''n''&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;) might be written as O(2&amp;lt;sup&amp;gt;''n''&amp;lt;/sup&amp;gt;) because the value of ''n''&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt; would eventually become small enough (relative to 2&amp;lt;sup&amp;gt;''n''&amp;lt;/sup&amp;gt;) to be rounded off.&lt;br /&gt;
&lt;br /&gt;
2.Big O notation is only an average estimation. The actual figure depends on the hardware, software, and the initial state of the list - consider if you needed to sort a pile of books by title you might luck to find most books are already in the correct position and only need to move one or two, or they might be hopelessly jumbled up and necessitate moving most, even all of them. Big O notation is mainly used to examine various methods to accomplish the same task, running on the same hardware, rather than being real-world benchmarks.&lt;br /&gt;
&lt;br /&gt;
A few common Big O notations are listed below, from smallest to largest:&lt;br /&gt;
&amp;lt;ul&amp;gt;&amp;lt;li&amp;gt;&amp;lt;b&amp;gt;&amp;lt;i&amp;gt;O&amp;lt;/i&amp;gt;(1)&amp;lt;/b&amp;gt; - Constant time, which means the sorting will always take X seconds no matter how big the data is&amp;lt;/li&amp;gt;&lt;br /&gt;
&amp;lt;li&amp;gt;&amp;lt;b&amp;gt;&amp;lt;i&amp;gt;O&amp;lt;/i&amp;gt;(log(''n''))&amp;lt;/b&amp;gt; - Logarithmic time, which means the executing time grows only a little when the input grows a lot&amp;lt;/li&amp;gt;&lt;br /&gt;
&amp;lt;li&amp;gt;&amp;lt;b&amp;gt;&amp;lt;i&amp;gt;O&amp;lt;/i&amp;gt;(''n'')&amp;lt;/b&amp;gt; - Linear time, which means the execution time grows in direct proportion to the size of the data&amp;lt;/li&amp;gt;&lt;br /&gt;
&amp;lt;li&amp;gt;&amp;lt;b&amp;gt;&amp;lt;i&amp;gt;O&amp;lt;/i&amp;gt;(''n'' log(''n''))&amp;lt;/b&amp;gt; - The execution time grows proportionally to ''n'' * the {{w|logarithm}} of ''n''. For small lists, this value would be smaller than O(n) (meaning it'll take less time), but as the lists grow it will generally take more time (again, on average).&amp;lt;/li&amp;gt;&lt;br /&gt;
&amp;lt;li&amp;gt;&amp;lt;b&amp;gt;&amp;lt;i&amp;gt;O&amp;lt;/i&amp;gt;(''n''&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;)&amp;lt;/b&amp;gt; - Quadratic time, meaning the execution time grows proportionally to the ''square'' of the size of the data.&amp;lt;/li&amp;gt;&amp;lt;/ul&amp;gt;&lt;br /&gt;
&lt;br /&gt;
As one can image in most contexts one would wish for sorting to be done as fast as possible, so O(1) is better than O(n), which is in turn better than O(n*log(n)) etc (at least assuming your lists are relatively large).  The code in the comic describes a 'linear' sort that first sorts the list using {{w|merge sort}}, which is known to take time O(''n'' log(''n'')), and then `sleep()`s (pauses with no activity) for an amount of time equal to subtracting the time taken for the sort from the number of elements multiplied by 1 million (1e6) seconds. Here the joke is that, rather than creating an algorithm that actually takes O(n) time it simply disguises an algorithm that takes O(n*log(n)) and makes it appear to be O(n) - and if 2 and 4 lines are removed, it will indeed work like O(n*log(n)). The runtime is much longer than mergesort's, but it increases linearly with the length of the list, so it appears to be O(n). This is obviously not ideal as waiting around doing nothing is the opposite of optimization.{{cn}}&lt;br /&gt;
&lt;br /&gt;
This joke is carried on by the title text, which refers to the {{w|Best, worst and average case|best and worst case}} of a sort, which are additional measures of its runtime to describe the shortest and longest potential times. A more optimal sort may decide how much of a list needs to be passed over again after its first pass of shuffling elements around; scanning a pre-sorted list (and deducing that it has no more checking to do) could mean that no more effort is needed, resulting in a best case of O(''n''). Depending upon the algorithm, presenting a list that is in an ordering that happens to challenge it the most (such as exactly reversed) may mean even an 'average O(''n'' log ''n'')' process would have to exceed this, resulting in a worst-case number of operations that may be O(''n&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;''). It can be very useful to know that a given sorting method ''may'' take the average order of time, but have the possibility of a much shorter ''or'' longer runtime... especially when the method is expected to be [[1185: Ineffective Sorts|far, far worse than others]], where only particular and more idealistic input lets it approach the more satisfyingly fast average/best responses.&lt;br /&gt;
&lt;br /&gt;
By forcing all practical searches to take O(''n'') time, regardless of how otherwise identical data is presorted, the best case (and worst case, for that matter) will also be O(''n''). The last part of the text then plays on another meaning of best case and worst case, as best- and {{w|worst-case scenario}}s for a situation, by saying that the worst outcome for the code's author is when someone decides to investigate the code (perhaps owing to its absurd runtime, or else just justifiably skeptical of the declared optimality), whereupon that investigator will discover the deception and ruin the author's reputation.&lt;br /&gt;
&lt;br /&gt;
One possible advantage, to doing something ''like'' this, could be to prevent some form of {{w|timing attack}} from being effective, but it is highly doubtful that this would be usefully applied either to the implementation of a sort ''or'' with such an excessive inbuilt delay factor.&lt;br /&gt;
&lt;br /&gt;
It is worth noting that almost every time someone uses a big O on this page, they actually mean a big theta. Those aren’t the same thing. If you say something happens in Θ(f(N)) time, then f(N) is how long it takes (within a constant factor) in the limit for large N. In other words, it takes asymptotic time f(N). But if it takes O(f(N)) time, then the limit is at most f(n), but might actually be much lower. So mergesort takes O(N log N) time. And it also takes O(2^N) time. And it takes Θ(N log N) time. But it does NOT take Θ(2^N) time.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
:[The panel shows five lines of code:]&lt;br /&gt;
:function LinearSort(list):&lt;br /&gt;
::StartTime=Time()&lt;br /&gt;
::MergeSort(list)&lt;br /&gt;
::Sleep(1e6*length(list)-(Time()-StartTime))&lt;br /&gt;
::return&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:How to sort a list in linear time&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Programming]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Donald_Trump&amp;diff=359724</id>
		<title>Donald Trump</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Donald_Trump&amp;diff=359724"/>
				<updated>2024-12-17T18:58:39Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: If it needs updates later, then put the incomplete tag later&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{Infobox character&lt;br /&gt;
| image      = Donald Trump.jpeg&lt;br /&gt;
| imagesize  = 200px&lt;br /&gt;
| caption    = '&lt;br /&gt;
| first_appearance = [[980: Money]]&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
&amp;lt;noinclude&amp;gt;:''For a list of comics, see [[:Category:Comics featuring Donald Trump|Comics featuring Donald Trump]].''&amp;lt;/noinclude&amp;gt;&lt;br /&gt;
&lt;br /&gt;
'''{{w}}''' is an American politician, media personality, and businessperson who served as the 45th {{w|president of the United States}} from 2017 to 2021 and will serve again from 2025 to 2029 as the 47th president. He won the 2016 election as a Republican with controversial policies. His presidency involved actions like travel bans, border wall funding, tax cuts, Supreme Court appointments, environmental deregulation, and strained international relations. After losing the 2020 election, he faced impeachments and legal issues, but continued political involvement. Amidst multiple indictments in 2023 he announced his candidacy for the 2024 election, which he won. During the 2024 presidential race Randall announced his support for Trump's opponent, [[Kamala Harris]].&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{navbox-characters}}&lt;br /&gt;
[[Category:Characters]]&lt;br /&gt;
[[Category:Real people]]&lt;br /&gt;
[[Category:Politicians]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:3024:_METAR&amp;diff=359474</id>
		<title>Talk:3024: METAR</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:3024:_METAR&amp;diff=359474"/>
				<updated>2024-12-14T06:20:33Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
OMG RANDALL ADDED AN AO3 REFERENCE '''[[User:42.book.addict|&amp;lt;span style=&amp;quot;font-family:Cormorant Garamond;font-size:9pt;color:#A9C6CA&amp;quot;&amp;gt;42.book.addict&amp;lt;/span&amp;gt;]]&amp;lt;sup&amp;gt;[[User talk:42.book.addict|&amp;lt;span style=&amp;quot;font-family:Cormorant Garamond;font-size:6pt;color:#516874&amp;quot;&amp;gt;Talk to me!&amp;lt;/span&amp;gt;]]&amp;lt;/sup&amp;gt;''' 19:43, 13 December 2024 (UTC)&lt;br /&gt;
:must've been reading the fic of bill [[User:CalibansCreations|'''&amp;lt;span style=&amp;quot;color:#ff0000;&amp;quot;&amp;gt;Caliban&amp;lt;/span&amp;gt;''']] ([[User talk:CalibansCreations|talk]]) 21:04, 13 December 2024 (UTC)&lt;br /&gt;
I love the things I learn from these things[[User:Rustykid52|Rustykid52]] ([[User talk:Rustykid52|talk]]) 19:48, 13 December 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Was the explanation of wind speed written by a European? The punctuation after &amp;quot;18&amp;quot; is a comma, not a period, so they it means over 18 thousand knots. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 19:59, 13 December 2024 (UTC)&lt;br /&gt;
: Yes, it was. I'm sorry. [[User:Janfred|Janfred]] ([[User talk:Janfred|talk]])&lt;br /&gt;
: If windspeed interpreted at &amp;quot;european style&amp;quot;, i.e. 18 and 35/1000 knots, it s still funny, beacouse such precision of wind speed measurement is 1] unreachable (variability at space &amp;amp; time is several horders higher), 2] useless (fraction of knot make no difference for pilots). ([[HonzaM])&lt;br /&gt;
	&lt;br /&gt;
&amp;quot;38.08 inches of mercury&amp;quot; seems a very high pressure, even for a station that is well below sea level. (1290 hPa Pressure around the dead sea is typically 1060hPa)..  Is that physically realistic, or is it part of the joke?  I know funnel clouds, freezing and volcanic ash in the same location are unlikely outside of the apocalypse, but can be justified by the rule of funny. [[Special:Contributions/172.70.160.135|172.70.160.135]] 20:11, 13 December 2024 (UTC)&lt;br /&gt;
:Indeed, 31.80 is the reference high limit. Still, is Randall a pilot? The structure of a METAR is horribly familiar to us pilots but pretty much a blank stare to anyone else. [[Special:Contributions/172.68.245.25|172.68.245.25]] 21:03, 13 December 2024 (UTC)&lt;br /&gt;
:Feeding it into a [https://www.weather.gov/epz/wxcalc_pressurealtitude calculator] gives an altitude of -2080m (-6825'). So it's entirely reasonable as long as your weather station is in a deep mine. [[User:BunsenH|BunsenH]] ([[User talk:BunsenH|talk]]) 21:08, 13 December 2024 (UTC)&lt;br /&gt;
:: But isn't the value always put in reference to MSL? I.e. I'm at an airport at 1000ft, the pressure reads 977 hPa, but I'll put 1013 hPa in the METAR. (QNH in METAR vs QFE at the station) [[User:Janfred|Janfred]] ([[User talk:Janfred|talk]]) 21:14, 13 December 2024 (UTC)&lt;br /&gt;
::: There may be various complicated pressure differences from the tornado having dumped a load of possibly Iclandic pyroclastic tephra upon the station. [[Special:Contributions/141.101.98.181|141.101.98.181]] 21:36, 13 December 2024 (UTC)&lt;br /&gt;
:&amp;quot;outside of the apocalypse&amp;quot; - we are talking about NYC :P [[Special:Contributions/172.69.64.171|172.69.64.171]] 00:04, 14 December 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Damn, Randall says you got No Bitches.[[User:Xurkitree10|Xurkitree10]] ([[User talk:Xurkitree10|talk]]) 06:20, 14 December 2024 (UTC)&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:3024:_METAR&amp;diff=359473</id>
		<title>Talk:3024: METAR</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:3024:_METAR&amp;diff=359473"/>
				<updated>2024-12-14T06:20:23Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
OMG RANDALL ADDED AN AO3 REFERENCE '''[[User:42.book.addict|&amp;lt;span style=&amp;quot;font-family:Cormorant Garamond;font-size:9pt;color:#A9C6CA&amp;quot;&amp;gt;42.book.addict&amp;lt;/span&amp;gt;]]&amp;lt;sup&amp;gt;[[User talk:42.book.addict|&amp;lt;span style=&amp;quot;font-family:Cormorant Garamond;font-size:6pt;color:#516874&amp;quot;&amp;gt;Talk to me!&amp;lt;/span&amp;gt;]]&amp;lt;/sup&amp;gt;''' 19:43, 13 December 2024 (UTC)&lt;br /&gt;
:must've been reading the fic of bill [[User:CalibansCreations|'''&amp;lt;span style=&amp;quot;color:#ff0000;&amp;quot;&amp;gt;Caliban&amp;lt;/span&amp;gt;''']] ([[User talk:CalibansCreations|talk]]) 21:04, 13 December 2024 (UTC)&lt;br /&gt;
I love the things I learn from these things[[User:Rustykid52|Rustykid52]] ([[User talk:Rustykid52|talk]]) 19:48, 13 December 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Was the explanation of wind speed written by a European? The punctuation after &amp;quot;18&amp;quot; is a comma, not a period, so they it means over 18 thousand knots. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 19:59, 13 December 2024 (UTC)&lt;br /&gt;
: Yes, it was. I'm sorry. [[User:Janfred|Janfred]] ([[User talk:Janfred|talk]])&lt;br /&gt;
: If windspeed interpreted at &amp;quot;european style&amp;quot;, i.e. 18 and 35/1000 knots, it s still funny, beacouse such precision of wind speed measurement is 1] unreachable (variability at space &amp;amp; time is several horders higher), 2] useless (fraction of knot make no difference for pilots). ([[HonzaM])&lt;br /&gt;
	&lt;br /&gt;
&amp;quot;38.08 inches of mercury&amp;quot; seems a very high pressure, even for a station that is well below sea level. (1290 hPa Pressure around the dead sea is typically 1060hPa)..  Is that physically realistic, or is it part of the joke?  I know funnel clouds, freezing and volcanic ash in the same location are unlikely outside of the apocalypse, but can be justified by the rule of funny. [[Special:Contributions/172.70.160.135|172.70.160.135]] 20:11, 13 December 2024 (UTC)&lt;br /&gt;
:Indeed, 31.80 is the reference high limit. Still, is Randall a pilot? The structure of a METAR is horribly familiar to us pilots but pretty much a blank stare to anyone else. [[Special:Contributions/172.68.245.25|172.68.245.25]] 21:03, 13 December 2024 (UTC)&lt;br /&gt;
:Feeding it into a [https://www.weather.gov/epz/wxcalc_pressurealtitude calculator] gives an altitude of -2080m (-6825'). So it's entirely reasonable as long as your weather station is in a deep mine. [[User:BunsenH|BunsenH]] ([[User talk:BunsenH|talk]]) 21:08, 13 December 2024 (UTC)&lt;br /&gt;
:: But isn't the value always put in reference to MSL? I.e. I'm at an airport at 1000ft, the pressure reads 977 hPa, but I'll put 1013 hPa in the METAR. (QNH in METAR vs QFE at the station) [[User:Janfred|Janfred]] ([[User talk:Janfred|talk]]) 21:14, 13 December 2024 (UTC)&lt;br /&gt;
::: There may be various complicated pressure differences from the tornado having dumped a load of possibly Iclandic pyroclastic tephra upon the station. [[Special:Contributions/141.101.98.181|141.101.98.181]] 21:36, 13 December 2024 (UTC)&lt;br /&gt;
:&amp;quot;outside of the apocalypse&amp;quot; - we are talking about NYC :P [[Special:Contributions/172.69.64.171|172.69.64.171]] 00:04, 14 December 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Damn, Randall says you got No Bitches.&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3020:_Infinite_Armada_Chess&amp;diff=358677</id>
		<title>3020: Infinite Armada Chess</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3020:_Infinite_Armada_Chess&amp;diff=358677"/>
				<updated>2024-12-05T14:29:25Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */ not necessary&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 3020&lt;br /&gt;
| date      = December 4, 2024&lt;br /&gt;
| title     = Infinite Armada Chess&lt;br /&gt;
| image     = infinite_armada_chess_2x.png&lt;br /&gt;
| imagesize = 282x497px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Stockfish 16 suggests the unconventional opening 1. RuntimeError: Out of bounds memory access&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by an infinite armada of stockfish BOTS - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
{{w|Chess}} is a board game played between two players on an 8x8 chessboard. In standard chess, each player has 8 pawns and 8 other pieces: 2 rooks, 2 knights, 2 bishops, a queen, and a king. {{w|Chess variants}} are chess games in which the rules, board sizes, and/or piece behaviors are altered. In the chess game presented here, a non-standard chessboard is used, which extends vertically past the original 1st and 8th ranks off the page to infinity in both directions. Each square beyond the 8 standard ranks is filled by an additional queen. The {{w|Queen (chess)|queen}} is the most powerful piece on the chessboard, having the powers of a {{w|Bishop (chess)|bishop}} and a {{w|Rook (chess)|rook}} combined. With an |infinite armada of queens, each player will have more resources to call on. Sometimes having a bunch of queens [https://x.com/chesscom/status/1841540380363211164 doesn't go very well], however.&lt;br /&gt;
&lt;br /&gt;
In {{w|algebraic chess notation}}, chess moves are represented by the move number, the piece moved (unless it's a pawn), and the destination square (with additions to indicate special circumstances and disambiguation). For example, the sequence 1. e4 Nf6 indicates that White opened the game by moving their e-pawn to the e4 square and Black replied by moving their kingside knight to f6, the {{w|Alekhine Defence}}. In the title text, {{w|Stockfish (Chess)|Stockfish}} is a {{w|chess engine}} designed to evaluate a chessboard and find the best move.  However, it is designed to handle finite boards, so it is likely that some problem will occur as it runs. The specific error message &amp;quot;RuntimeError: Out of bounds memory access&amp;quot; is unique to the cross-browser {{w|WebAssembly}} implementations of {{w|WebGL}}, so there was probably not enough memory to render an infinite board in the browser window.&lt;br /&gt;
&lt;br /&gt;
While Stockfish is limited by the processing power of the computer on which it runs, it does not really need to consider the infinitely many pieces to suggest a move. Indeed, all but a finite number of pieces are stuck at every step, so there is always a finite number of possible moves, and so in theory it would be possible for suggestions to be made using a finite amount of {{w|RAM|memory}}. At the start of this game, the number of moves available for the first move are exactly the same as they would be in a normal game of chess, since all the additional queens are prevented from moving by surrounding pieces.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A chess board in the starting position, except it extends further at the top and bottom, going beyond the panel. The extra squares are filled with queens of the sides' respective colors.]&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Infinite armada chess&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Chess]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2831:_xkcd_Phone_Flip&amp;diff=354743</id>
		<title>2831: xkcd Phone Flip</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2831:_xkcd_Phone_Flip&amp;diff=354743"/>
				<updated>2024-10-27T05:29:16Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2831&lt;br /&gt;
| date      = September 20, 2023&lt;br /&gt;
| title     = xkcd Phone Flip&lt;br /&gt;
| image     = xkcd_phone_flip_2x.png&lt;br /&gt;
| imagesize = 740x458px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Theranos partnership: Sorry, we know, but we signed the contract back before all the stuff and the lawyers say we can't back out, so just try to keep your finger away from the bottom of the phone.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This is the 9th in the ongoing [[:Category:xkcd Phones|xkcd Phone]] series in which Randall explains his new joke phone designs with many strange and useless features. It is a reference to the somewhat recent {{w|Galaxy Z}} series, but instead of folding in half, it folds into the more complex and much less usable shape of a typical {{w|paper fortune teller}}. (A traditional paper fortune teller requires a square-shaped piece of material; to make this phone with a ~2:1 ratio rectangular shape into a fortune teller, it would first need to be folded in half lengthwise.) &lt;br /&gt;
&lt;br /&gt;
The product's slogan suggests that this was not an intended feature, which would be incredibly difficult to create accidentally without causing the phone to become nonfunctional. It's therefore possible that this phone was designed by [[:Category:Beret Guy's Business|Beret Guy's company]], which has in the past [[1493: Meeting|trademarked seemingly normal phrases]] and [[1293: Job Interview|done impossible things with electronics]].&lt;br /&gt;
&lt;br /&gt;
The name Phone Flip is a play on the term {{w|Flip Phone}}, which has referred to older cellphones with a {{w|Clamshell design|basic hinged construction}}, but {{w|Samsung}}, in particular, has released a line of {{w|smartphones}} under the Galaxy Z range given the name 'Flip' (or 'Fold') which use a flexible display across the hinge, with {{w|Motorola Razr|other manufacturers}} producing similar technology by other names. Randall's version takes this complexity up a notch with a currently impractical varifolded origami design.&lt;br /&gt;
&lt;br /&gt;
===Left column features===&lt;br /&gt;
&lt;br /&gt;
; Exfoliating screen&lt;br /&gt;
: A term commonly found on lotions and facial products, &amp;quot;exfoliating&amp;quot; means removing dead skin cells from the surface of the skin, in order to improve its appearance. This could mean that it will exfoliate the user's skin when pressed to it.  However, this would probably require a mildly abrasive and/or adhesive screen texture or coating, which are usually not desirable qualities of a touchscreen. A different reading is that the screen itself exfoliates, i.e. slowly disintegrates. Unless the phone is an organism able to regrow exfoliated surfaces, this will eventually lead to the screen's disappearance, not an improvement of its appearance. &lt;br /&gt;
&lt;br /&gt;
; Orthotic shape for arch support&lt;br /&gt;
: {{w|Orthotics}} are devices used to reduce stress on the body. &amp;quot;Arch support&amp;quot; is a specific term referring to padded inserts designed to fit to the contour of a person's foot and provide support for the arch of the foot, a raised area between the ball in front and the heel in back. Fitting this space requires either a curved shape or one that's thicker in the center, which would usually make a phone less straightforward ([[No Pun Intended|pun not intended]]) to use. (This assumes, of course, that the foot is shaped like a &amp;quot;normal&amp;quot; human foot.) Additionally, the materials used in a phone are not typically suitable for orthotic usage and doing so could worsen any issues and damage the phone from the stress of the person's weight upon it. However, it's possible that in this context, the phone is ergonomically shaped to fit the way that the typical hand arches around it. In the context of a smartphone, &amp;quot;Arch support&amp;quot; may also mean support for installing {{w|Arch Linux}}.&lt;br /&gt;
&lt;br /&gt;
; Single big pixel	&lt;br /&gt;
: A joke about how phones advertise how many pixels they have, not how few. Typical phone displays use many small {{w|pixels}}, each with relatively few display states.  For instance, each pixel can show a uniform color.  It would be difficult to make a useful display with a single pixel of this sort.  Some displays use smaller numbers of more complicated picture elements (e.g., each element could show a letter, like a {{w|split-flap display}}, or a {{w|nixie tube}}).  To make a useful display with one pixel means that element needs a different display state for every image the phone can show (like a {{w|carousel slide projector}}, {{w|movie projector}}, or {{w|gobo (lighting)|gobo}}). This may also be a joke on &amp;quot;{{w|Megapixel}}&amp;quot;. &lt;br /&gt;
&lt;br /&gt;
; Ready to eat&lt;br /&gt;
: A typical sales pitch for {{w|convenience foods}} denoting that no time must be spent preparing the product for safe consumption, in contrast to other such meals where ingredients would need to be combined and/or cooked in some fashion. It is unknown how a phone could be produced in such a way as to be edible (perhaps the display could use {{w|sugar glass}}), but in any case, it seems likely that eating it would limit its future usefulness as a phone.{{Citation needed}} An alternative interpretation is that the phone is alive and all ready to begin consuming its prey, whatever that may be.&lt;br /&gt;
&lt;br /&gt;
; Hypoimmunogenic&lt;br /&gt;
: Meaning less able to produce an immune response - so perhaps useful in that people do not want their phone to cause an immune response in their body, although cell phones typically cause no immune response. This is probably related to items that are marketed as hypoallergenic, less likely to cause an allergic reaction. It may also be a reference to persistent unsubstantiated claims that radio waves from mobile phones cause cancer and other disorders.&lt;br /&gt;
&lt;br /&gt;
; Up to 50% more&lt;br /&gt;
: A play on the words &amp;quot;Up to 50% more &amp;lt;product&amp;gt;&amp;quot;. Although considering that there is no mention of what product there could possibly be 50% more of (or 0% extra, as that is ''also'' less than or equal to 50%), this statement is useless. See [[870: Advertising]].&lt;br /&gt;
&lt;br /&gt;
; Full-spectrum backlight optimized for plant growth&lt;br /&gt;
: {{w|Full-spectrum light}}s and backlights are typically used to increase {{w|color rendering}} accuracy, especially important in photography, art, and printing.  It typically refers to the part of the spectrum people can see.  Plants respond to some wavelengths outside our visual spectrum (e.g., UVA), and are less influenced by some portions of the visual spectrum (e.g. green, hence mostly reflecting such light).  A backlight optimized for plant growth would not provide a very natural appearance to our eyes and typically appear pink.  The screen backlight is unlikely to be used for growing plants.  One scenario in which this would be an advantage is at the end of the phone's useful life; instead of being recycled, it could be repurposed as a light in a greenhouse.&lt;br /&gt;
&lt;br /&gt;
; Long-lasting main sequence battery&lt;br /&gt;
: Perhaps referring to a &amp;quot;{{w|main sequence}}&amp;quot; star (Dwarf stars, like the {{w|Sun}}, where main energy generation is hydrogen fusion). Such stars spend a long time in this phase of evolution.  This might also explain SPF 15 and full-spectrum backlight.  Stars do last a long time compared to most cell phone batteries.{{Citation needed}} This feature might be a reference to [[1422: My Phone is Dying]].&lt;br /&gt;
&lt;br /&gt;
; Break glass to access apps&lt;br /&gt;
: A play on how emergency paraphernalia such as fire alarms and extinguishers are protected by glass casings in most places. The idea of this is to discourage removal of these items except in an emergency situation. It would not be helpful in the case of smartphone apps, which are frequently used. Presumably you would have to replace the glass each time you use an app, which is likely to prove tedious and expensive. Unusual things behind glass is also mentioned in [[1634: In Case of Emergency]]. Could also refer to the process of Jailbreaking a smartphone, such as an iPhone, to allow the install of 3rd party apps from an alternate app store.&lt;br /&gt;
&lt;br /&gt;
===Right column features===&lt;br /&gt;
&lt;br /&gt;
; Buy one get one&lt;br /&gt;
: A play on typical retail sales advertised as &amp;quot;Buy one get one ____&amp;quot;, where one buys one item at full price and gets another of that item either for free or at a reduced price. Since no discount has been mentioned, it would imply either (1) that you can get two at full price or perhaps (2) simply that if you buy a phone, you receive the phone; this is expected upon almost all purchases and is {{w|Tautology (logic)|tautological}} in nature.&lt;br /&gt;
&lt;br /&gt;
; Bending phone activates chemical flashlight&lt;br /&gt;
: This feature parallels a {{w|glow stick}}, which is also activated by bending the stick; this breaks an inner capsule causing chemicals to mix and produce light. However, doing this with a phone is likely to cause physical or chemical damage and additionally only works once, which is not very useful for a phone flashlight that one typically uses as a tool throughout the phone's lifetime. It might be fun at a rave though.&lt;br /&gt;
&lt;br /&gt;
; SPF 15 coating protects your face from websites&lt;br /&gt;
: Sun protection factor (SPF) is a rating used to compare the protection provided by sun screens.  Some people find some web sites excessively bright, colorful or garish, making them hard to read, or causing eye strain.  This extends that to imply that some sites are so bright that they might cause {{w|sunburn}}.  In reality, some sites, browsers, or plugins provide a {{w|night mode}}, for those who have problems with excess brightness. (See also full spectrum, and main sequence battery.)&lt;br /&gt;
: Alternatively, SPF in this context might be a novel term for, for example, ''site'' protection factor, or ''socials'' protection factor, and be a method for protecting you from viewing potentially harmful content encountered on the internet.&lt;br /&gt;
&lt;br /&gt;
; Iatrogenic construction&lt;br /&gt;
: 'Iatrogenic' means 'physician caused', and usually refers to illnesses which are caused or worsened by medical malpractice. This may imply that the phone was made ''by'' doctors, which may align with the statement given in the title text.&lt;br /&gt;
&lt;br /&gt;
; All-vinyl data storage for maximum fidelity&lt;br /&gt;
: This is a reference to the hipster maxim that vinyl records provide high fidelity music. And while {{w|vinyl data}} storage does exist, it's profoundly outdated and was never widely adopted. The relevant formats had several issues, including (relevantly) wear issues that lead to fidelity problems after repeated reads. It is also unlikely that vinyl storage could be engineered to provide sufficient storage density to meet the requirements of a modern smartphone.&lt;br /&gt;
&lt;br /&gt;
; Locks in moisture&lt;br /&gt;
: Good for cosmetics perhaps, to combat 'dry skin' (which is really more to do with substances other than water), but generally bad for a cell phone, where ingress (let alone retention) of liquids tends not to help the electronics. Most modern phones cite their ability to lock ''out'' moisture.&lt;br /&gt;
&lt;br /&gt;
; National Weather Service partnership - phone is afraid of thunder&lt;br /&gt;
: Probably a reference to the development of various public service systems which generate an alert to phone users to warn of likely dangerous events, such as storms, earthquakes, etc. In this case, though, rather than generate fear in the user, the phone itself becomes afraid. This may be further referencing the fact that, thanks to humanized personal assistant functions, some people have developed pseudo-human relationships with their devices, whereby they attribute emotions and other human characteristics to them. In reality, phones do not have emotions (yet), but even if they did, it's not clear how this would be a useful feature. How this fear manifests is also unexplained. It may turn off, or it may scream like the original xkcd phone did when in free fall. A number&amp;lt;!-- I've not yet counted how many, but it's definitely a number! ;) --&amp;gt; of the previous xkcd phones have had unexplained, inexplicable, or incomprehensible partnerships.&lt;br /&gt;
&lt;br /&gt;
; One-click ''ruina montium''&lt;br /&gt;
: ''{{w|Ruina montium}}'' ('mountain destroyer') was a now-lost mining technique used by the ancient Romans, thought to involve a form of hydrostatic drilling. It is not clear how this could be applied by a smartphone, let alone as a one-click operation. This may be a reference to the mobile phone industry's reliance on often unsustainable mining practices to supply the precious metals, rare earths, and other minerals required to make their devices work.&lt;br /&gt;
&lt;br /&gt;
; Free refills&lt;br /&gt;
: Good for restaurant drinks, not typical for cell phones.  Realistic meanings include providing complementary...&lt;br /&gt;
# &amp;quot;top ups&amp;quot; of cell phone plan minutes or data&lt;br /&gt;
# refueling (e.g., {{w|fuel cell}} power)&lt;br /&gt;
# recharging or {{w|battery swapping}}&lt;br /&gt;
# replacing the glass each time you use an app.&lt;br /&gt;
&lt;br /&gt;
===Title text===&lt;br /&gt;
The title text references the failed company {{w|Theranos}} that notably could not live up to its promise to diagnose many health issues from a single drop of blood, and was charged with fraud for claiming it could do so. Due to legal agreements, and subsequent design choices already built in, the bottom of the phone ''will'' still collect a drop of your blood (unless you're particularly careful).&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A rectangular phone with a touch screen. There is a small dark camera section at the top of the screen and a charging/connecting port may be shown on the lower casing edge. Lines on the left side of the phone lead from the general area of the image to feature descriptions down the leftmost edge of the frame.]&lt;br /&gt;
:Exfoliating screen&lt;br /&gt;
:Orthotic shape for arch support&lt;br /&gt;
:Single big pixel&lt;br /&gt;
:Ready to eat&lt;br /&gt;
:Hypoimmunogenic&lt;br /&gt;
:Up to 50% more&lt;br /&gt;
:Full-spectrum backlight optimized for plant growth&lt;br /&gt;
:Long-lasting main sequence battery&lt;br /&gt;
:Break glass to access apps&lt;br /&gt;
&lt;br /&gt;
:[Two phones folded in the shape of a 'paper fortune teller' are depicted on the right, set one above the other with other general feature lines leading off from the nearest folded phone illustration towards further listed items down the right-hand side of the frame.]&lt;br /&gt;
:Buy one get one&lt;br /&gt;
:Bending phone activates chemical flashlight&lt;br /&gt;
:SPF 15 coating protects your face from websites&lt;br /&gt;
:Iatrogenic construction&lt;br /&gt;
:All-vinyl data storage for maximum fidelity&lt;br /&gt;
:Locks in moisture&lt;br /&gt;
:National Weather Service partnership: phone is afraid of thunder&lt;br /&gt;
:One-click ''ruina montium''&lt;br /&gt;
:Free refills&lt;br /&gt;
&lt;br /&gt;
:[Text below the phone:]&lt;br /&gt;
:Introducing&lt;br /&gt;
:'''The xkcd Phone Flip'''&lt;br /&gt;
:''We actually didn't mean for it to do this''™&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:xkcd Phones]]&lt;br /&gt;
[[Category:Comics sharing name|xkcd Phones]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2784:_Drainage_Basins&amp;diff=354157</id>
		<title>2784: Drainage Basins</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2784:_Drainage_Basins&amp;diff=354157"/>
				<updated>2024-10-24T19:00:04Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2784&lt;br /&gt;
| date      = June 2, 2023&lt;br /&gt;
| title     = Drainage Basins&lt;br /&gt;
| image     = drainage_basins_2x.png&lt;br /&gt;
| imagesize = 659x500px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = After a pail of water was thrown on the Wicked Witch of the West outside Salt Lake City, Utah's Great Salt Lake was measured to be 7 parts per trillion witch by volume.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
&lt;br /&gt;
Alex Mack, the main character in the Nickelodeon show ''{{w|The Secret World of Alex Mack}}'', developed superpowers after being drenched by an experimental substance. One of these is the ability to turn into a puddle of liquid.&lt;br /&gt;
&lt;br /&gt;
A {{w|drainage basin}} is an area of land where all flowing water converges by one or more outlets to the same body of water. The comic shows a {{w|Drainage divide|watershed map}} for the United States by depicting its drainage basins.&lt;br /&gt;
&lt;br /&gt;
When Randall sees a map of the US's major drainage basins, he thinks of Alex turning into liquid and flowing as part of the basin she happens to be in at the time.&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|Wicked Witch of the West}}, a character from ''{{w|The Wonderful Wizard of Oz}}'', wherein a bucket of water is thrown on her, causing her to dissolve into a puddle. If this happens near {{w|Salt Lake City}} she would flow into Utah's {{w|Great Salt Lake}}, as its location in the Great Basin would prevent her from flowing to an ocean. If its dissolved particles are measured, a tiny fraction will be witch. Seven trillionths of the lake's nominal 18.93 cubic km volume is about 130 liters, which is approximately twice the volume of a typical human being. Randall may be approximating the lake's current, lower volume, which was [https://pws.byu.edu/great-salt-lake 27% of its nominal volume at one point] but has [https://wildlife.utah.gov/gslep/about/water-levels.html risen substantially in 2022-23] due to heavier rains than other recent years; or  witches may be twice the size of normal people; or witch matter may be particularly dense, and double in volume when dissolved in water; or he may be including the Witch's sister, the Wicked Witch of the East, as well. The {{w|Land of Oz}} is described to be somewhere else entirely, surrounded by desert, and thus perhaps has its own salt-lake basin(s); but famously it is not in Kansas, from which any witch-water would have ultimately flowed down to the Gulf of Mexico via the Mississippi. It is possible that Randall's choice of Salt Lake City is referencing the ''{{w|Surrender Dorothy}}'' meme that LDS temples look like Oz.&lt;br /&gt;
&lt;br /&gt;
There is an error in the map. The map does not show the border between Michigan's Upper Peninsula and Wisconsin; in reality, this peninsula is part of Michigan.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Title, scribbled out in red:] &amp;lt;s&amp;gt;US Drainage Basins&amp;lt;/s&amp;gt;&lt;br /&gt;
:[New title, in red, added below:] &amp;lt;span style=&amp;quot;color:red&amp;quot;&amp;gt;Where Alex Mack Will End Up&amp;lt;/span&amp;gt;&lt;br /&gt;
&lt;br /&gt;
:[Map of the United States, the state borders in light pen; the national borders, seaboards and major lakes in black pen, plus additional boundaries as appropriate between the following labeled drainage basins:]&lt;br /&gt;
:[Much or all of Washington, Idaho, Oregon, California, Arizona and about half of Utah:] Pacific Ocean&lt;br /&gt;
:[Hawaiian islands, in typical US map repositioning:] Pacific Ocean&lt;br /&gt;
:[Alaska, in typical map repositioning, below a line approximately the three quarters up from the south:] Pacific Ocean&lt;br /&gt;
:[Remainder of Alaska:] Arctic Ocean&lt;br /&gt;
:[Most of Nevada, the western half of Utah (including the Great Salt Lake, outlined) and about a third of California (with the Salton Sea outlined):] Great Basin&lt;br /&gt;
:[A small patch of Wyoming, a triangle of New Mexico lying on the Mexican border and a separate thin swath through parts of New Mexico and Texas:] Various Basins&lt;br /&gt;
:[About half of North Dakota and a small section of northern Minnesota:] Hudson Bay&lt;br /&gt;
:[From northeast Minnesota across two thirds of Wisconsin, Michigan, a bit of northern Indiana, northern half of Ohio, and most of the eastern seaboard states of Maine, Vermont, New Hampshire, Massachusetts, New York, Long Island, New Jersey, Maryland, Virginia (not West Virginia), North and South Carolinas, half of Georgia and half of Florida (Lake Okeechobee visible):] Atlantic Ocean&lt;br /&gt;
:[All remaining states or parts of states:] Gulf of Mexico&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:How I still think of these maps, deep down&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Comics with red annotations]]&lt;br /&gt;
[[Category:Geography]]&lt;br /&gt;
[[Category:US maps]]&lt;br /&gt;
[[Category:Fiction]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2819:_Pronunciation&amp;diff=353679</id>
		<title>2819: Pronunciation</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2819:_Pronunciation&amp;diff=353679"/>
				<updated>2024-10-22T16:39:08Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2819&lt;br /&gt;
| date      = August 23, 2023&lt;br /&gt;
| title     = Pronunciation&lt;br /&gt;
| image     = pronunciation_2x.png&lt;br /&gt;
| imagesize = 315x257px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = I pronounce the 'u' in 'pronunciation' like in 'putting' but the 'ou' in 'pronounce' like in 'wound'.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
&lt;br /&gt;
Pronunciation guides are used in many languages to indicate the commonly accepted way to translate a written word into sound. This can be particularly important in the English language, where the pronunciation of individual letters and of combinations of letters can vary broadly, and there are very few rules that can be applied consistently. As a result, the 'correct' pronunciation of any given word is determined by common usage, and therefore can only be learned either by exposure or by memorizing them from guides. Some guides use the {{w|International Phonetic Alphabet}}, but the average person is not familiar with those characters, so most guides written for laypeople instead {{wiktionary|Appendix:English pronunciation|reference familiar words}} that feature the phonemes.&lt;br /&gt;
&lt;br /&gt;
This, of course, presumes that the reader is familiar with the pronunciation of ''those'' words, but the words should be chosen so that a) they're commonly known b) there is only one common pronunciation and c) the pronunciation doesn't vary much between regional accents. The comic seems to be poking fun of this idea by using words which can have vastly different pronunciations even for a single dialect or accent, let alone a geographically spread one, and by extension at how English pronunciation is a mess even at very small scales.&lt;br /&gt;
&lt;br /&gt;
In this strip, though, the selected guide-words are deliberately chosen to be confusing. They are {{w|Heteronym (linguistics)|heteronym}}s – spellings that are used for multiple words with different meaning which are pronounced in very different ways. Moreover for most of them it is the less common homograph which matches the pronunciation in &amp;quot;Tuesday&amp;quot;. In other words, how the reader chooses to pronounce each guide-word determines what pronunciation of &amp;quot;Tuesday&amp;quot; they end up with.&lt;br /&gt;
&lt;br /&gt;
To complicate things further, there are multiple 'correct' pronunciations of 'Tuesday', involving different pronunciations of practically every part of the word.&lt;br /&gt;
&lt;br /&gt;
(Note: General American pronunciations are primarily assumed here except when otherwise stated)&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
! Guide !! Correct for Tuesday !! Other !! Notes&lt;br /&gt;
|-&lt;br /&gt;
| Buffe'''t'''&lt;br /&gt;
| /ˈbʌf.ɪ'''t'''/ (verb: strike)&lt;br /&gt;
| /ˈbʌ.feɪ/ (noun: type of food service where a wide selection of foods are presented for diners to choose from, the table or heated fixture from which the food is served, or (in British English) a low cabinet used to store alcoholic spirits, glasses &amp;amp; plates.)&lt;br /&gt;
| The &amp;lt;t&amp;gt; in the &amp;quot;Other&amp;quot; pronunciation is silent (or arguably /ɪ/ or /j/)&lt;br /&gt;
|-&lt;br /&gt;
| Min'''u'''te&lt;br /&gt;
| /maɪˈn'''(j)uː'''t/ (adjective: small)&lt;br /&gt;
| /ˈmɪn'''ɪ'''t/ (noun: unit of time)&lt;br /&gt;
| There may be no combination of the first two letters which produces the 'correct' pronunciation of 'Tuesday', depending on whether the speaker uses the /ˈtʃuːz.deɪ/, /ˈtjuːz.deɪ/ or /ˈtuːz.deɪ/ form, and whether they include the /j/ sound in 'minute'.&lt;br /&gt;
|-&lt;br /&gt;
| R'''e'''cord&lt;br /&gt;
| (there is no inarguably 'correct' version in this position)&lt;br /&gt;
| /ɹ'''i'''ˈkɔɹd/ (verb: write down/make permanent)&lt;br /&gt;
&amp;lt;HR /&amp;gt;/ˈɹ'''ɛ'''kərd/ or /ˈɹ'''ɛ'''k.ɚd/ or /ˈɹ'''ɛ'''k.ɔɹd/ (noun: medium containing information; vinyl disc which has sound encoded in a spiral groove embossed on its surface)&lt;br /&gt;
| In some dialects the leading 'e' in both words is pronounced identically, though in the case of the noun there is more emphasis on the first syllable.&lt;br /&gt;
In others, for the verb it is almost silent, which could perhaps be considered the closest approximation to the &amp;quot;e&amp;quot; in 'Tuesday', which is typically not pronounced at all. It is more practical to consider it part of a digraph with the preceding &amp;quot;u&amp;quot;, to change that from being read as something more like /ʌ/ or /ʊ/ into the more rounded /(j)uː/ sound.&lt;br /&gt;
|-&lt;br /&gt;
| U'''s'''e&lt;br /&gt;
| /juː'''z'''/ (verb: to employ a thing for a particular end)&lt;br /&gt;
| /juː'''s'''/ (noun: the purpose for which that thing is employed)&lt;br /&gt;
| Some pronunciations of 'Tuesday' use a softer sound partway between these two examples.&lt;br /&gt;
|-&lt;br /&gt;
| Mope'''d'''&lt;br /&gt;
| /ˈmoʊ.pɛ'''d'''/ (noun: motor scooter with an engine smaller than 50cc)&lt;br /&gt;
| /moʊp'''t'''/ (verb: past tense of &amp;quot;mope,&amp;quot; to brood or feel dejected)&lt;br /&gt;
| Perhaps less notable than the other letters, as both forms of the letter in question form a hard consonant if applied to 'Tuesday.'&lt;br /&gt;
|-&lt;br /&gt;
| B'''a'''ss&lt;br /&gt;
| /b'''eɪ'''s/ (noun: low-pitched notes and the instruments that play them)&lt;br /&gt;
| /b'''æ'''s/ (noun: fish)&lt;br /&gt;
| In some pronunciations of 'Tuesday' the 'a' is silent.&lt;br /&gt;
&lt;br /&gt;
/æ/ is also correct in New Zealand English.&lt;br /&gt;
|-&lt;br /&gt;
| G'''y'''ro&lt;br /&gt;
| /ˈj'''iː'''.ɹoʊ/, /ˈj'''ɪ'''ɹoʊ/ or /ˈʒ'''ɪ'''ɹoʊ/ (noun: meat cooked on a vertical rotisserie, in Greek cuisine) &amp;lt;!-- /j/ or /&amp;amp;#676;/? It's unusual for G to sound like Y. Or is it really Y? --&amp;gt;&lt;br /&gt;
| /ˈd͡ʒ'''aɪ'''.ɹoʊ/ (noun: gyroscope)&lt;br /&gt;
| The meat can also be pronounced like the gyroscope. Also, in many dialects, the &amp;lt;ay&amp;gt; in Tuesday is pronounced [ɛʲ], in which case both options are wrong.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
Following this guide, a pronunciation of Tuesday as /iɛstæaɪ/ is possible. You can hear a pronunciation at [http://ipa-reader.xyz/?text=%C9%AA%C9%9Bst%C3%A6a%C9%AA http://ipa-reader.xyz]. A rather famous prior satirical take on spelling/pronunciation oddities is of the word &amp;quot;{{w|Ghoti}}&amp;quot;, as a 'valid' spelling of &amp;quot;Fish&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
The title text references how some people pronounce the word &amp;quot;pron'''u'''nciation&amp;quot; like &amp;quot;pron'''ou'''nce&amp;quot; (with /aʊ/) and others use a different vowel (/ʌ/). Here Randall is saying that he pronounces them with the 'u' from &amp;quot;p'''u'''tting&amp;quot; and the 'ou' from &amp;quot;w'''ou'''nd&amp;quot;. If we take putting to mean /ˈp'''ʌ'''tɪŋ/ (golf) and wound as /w'''aʊ'''nd/ (coiled), this could mean he pronounces them using the commonly differing pronunciations. However those two words could also be pronounced /ˈp'''ʊ'''tɪŋ/ (placing) and /w'''u'''nd/ (injury), indicating a non-standard way of saying each word. In accents that lack the {{w|Phonological_history_of_English_close_back_vowels#FOOT–STRUT_split|FOOT–STRUT split}}, such as those in the north of England, both versions of &amp;quot;putting&amp;quot; would be pronounced identically.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[The word &amp;quot;Tuesday&amp;quot;, with each letter labeled by a box with an arrow:]&lt;br /&gt;
:T: As in buffe'''t'''&lt;br /&gt;
:u: As in min'''u'''te&lt;br /&gt;
:e: As in r'''e'''cord&lt;br /&gt;
:s: As in u'''s'''e&lt;br /&gt;
:d: As in mope'''d'''&lt;br /&gt;
:a: As in b'''a'''ss&lt;br /&gt;
:y: As in g'''y'''ro&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Pet peeve: Ambiguous pronunciation guides&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Language]]&lt;br /&gt;
[[Category:Pet Peeves]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2982:_Water_Filtration&amp;diff=353379</id>
		<title>2982: Water Filtration</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2982:_Water_Filtration&amp;diff=353379"/>
				<updated>2024-10-21T05:24:58Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2982&lt;br /&gt;
| date      = September 6, 2024&lt;br /&gt;
| title     = Water Filtration&lt;br /&gt;
| image     = water_filtration_2x.png&lt;br /&gt;
| imagesize = 593x467px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = You'd think the most expensive part would be the quark-gluon plasma chamber, but it's actually usually the tube to the top of the atmosphere to carry the cosmic rays down.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic seems to be a diagram of how well water is purified, a common set of procedures done to make said water safe to drink. However, this well water is &amp;quot;purified&amp;quot; through a series of increasingly unnecessary, expensive, and possibly hazardous steps, ending with producing &amp;quot;pure&amp;quot; water synthesized from hydrogen and oxygen (which have each been synthesized from subatomic particles) - before promptly undoing all of the work by re-adding raw well water and its original minerals and probiotics, (which is one way of describing chemical and biological contaminants) &amp;quot;for taste and to support immune health&amp;quot;. In real life, groundwater generally only needs treatment for any contaminants (chemical or biological) known to be a problem based on the results of water testing or an incident, but adding the original water back in could be dangerous if the water has not been sampled recently. &lt;br /&gt;
A faucet is &amp;quot;a device that controls the flow of liquid, especially water, from a pipe&amp;quot;, commonly known as a ''tap'' in many parts of the world.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
!Step&lt;br /&gt;
!Real Device?&lt;br /&gt;
!Used for water treatment?&lt;br /&gt;
!Explanation&lt;br /&gt;
|-&lt;br /&gt;
|Water softener&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{Yes}}&lt;br /&gt;
|{{w|Water softening}} is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing and appliances by reducing or eliminating scale build-up in pipes, fittings, reservoirs, and so on. The comic shows the water either being passed through some granulated material (presumably, {{w|ion-exchange resins}}) or into a precipitation chamber for lime (or soda ash) softening. This is one of the few steps in this process that arguably fits the comic title of &amp;quot;Water Filtration.&amp;quot; &lt;br /&gt;
|-&lt;br /&gt;
|Reverse osmosis&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{Yes}}&lt;br /&gt;
|{{w|Reverse osmosis}} is a common step used in modern water-purification systems. It relies on using osmotic membranes and high pressures to separate water molecules from dissolved solutes and biological substances. Interestingly, it would also act as a softening step, rendering the previous step potentially redundant, depending on the goals for each step. It's also overkill for most wells, as groundwater often needs treatment targeted to only a few contaminants, if any treatment at all. This is one of the few steps in this process that definitely fits the comic title of &amp;quot;Water Filtration.&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Ultraviolet Sterilization&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{Yes}}&lt;br /&gt;
|{{w|Ultraviolet germicidal irradiation|Ultraviolet sterilization}} uses UV lamps at short wavelengths to damage the DNA and thereby kill micro-organisms in the water. In the USA, this is an uncommon method of well water sterilization, as the pathogens most likely to be found in well water (as opposed to surface water) are generally much more responsive to chemical disinfection. Many wells don't even need a disinfection step; whether this well needs disinfection or not, this is hardly the most impractical step in this treatment train. &lt;br /&gt;
|-&lt;br /&gt;
|Autoclave&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{Yes}}&lt;br /&gt;
|{{w|Autoclaves}} are essentially large pressure cookers that sterilize items and liquids through exposing them to a high temperature (~120°C or ~248°F) over tens of minutes in presence of water. By maintaining a high pressure, the boiling point of water goes up. This creates a very hot and humid atmosphere, making efficient heat transfer with all contents and inactivating all biological entities through this heat. They are commonly used in hospital and laboratory settings to sterilize plastics, glassware, equipment and solutions (like bottles of growth medium for bacteria) to be used in a sterile environment. The advantage of this method compared to dry heat (aka putting things in a 150°C-180°C oven until they are sterile) is that most lab plastics survive a passage at 120°C without melting. While difficult to streamline (as this technique is used for batches), it has the advantage over light-based methods that heat gets everywhere, and that instead of just damaging DNA, you also denature many of the proteins and other structures of microorganisms.  Some proteins, such as {{w|prion}}s, can survive autoclaving intact but, for most purposes, equipment that's been autoclaved can be regarded as sterile.&lt;br /&gt;
|-&lt;br /&gt;
|Condenser&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{Yes}}&lt;br /&gt;
|This step condenses the steam generated by the autoclave back into water. This is a normal part of the process used in &amp;quot;traditional&amp;quot; water purification by distillation. &lt;br /&gt;
|-&lt;br /&gt;
|Regular osmosis&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|Regular osmosis (also known as &amp;quot;osmosis&amp;quot;) is the tendency of a solvent (like water) to flow through a semipermeable membrane towards the side that has a higher concentration of dissolved molecules or ions. It therefore goes from a purer state to a less pure state, the opposite of filtration.&lt;br /&gt;
|-&lt;br /&gt;
|X-Ray Sterilization&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|{{w|Sterilization_(microbiology)#Ionizing_radiation_sterilization|X-ray sterilization}} is used to sterilize equipment, and may also be used as a cold method (in contrast to techniques like pasteurization) of eliminating germs and killing insects in fresh foodstuffs. Has also been used to sterilize postal mail.&lt;br /&gt;
|-&lt;br /&gt;
|Carbon Filter&lt;br /&gt;
|{{No|Fake}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|The water is passed through some volume of carbon - a riff on activated carbon filters, which ''are'' used in water filtration as seen later in the process. The exact {{w|allotropy|allotrope}} of carbon is not mentioned, so this could possibly be a graphite, carbon nanotubes, or even solid diamond &amp;quot;filter&amp;quot;. This is one of the few steps in this process that definitely fits the comic title of &amp;quot;Water Filtration.&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Neutron Source&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|A {{w|neutron source}} generates high-energy neutrons. High-energy neutrons are highly penetrating and will cause ionization events to occur due to collision with atoms in the water. This can potentially make the water more radioactive due to the generation of radioactive isotopes.&lt;br /&gt;
|-&lt;br /&gt;
|Activated Carbon Filter&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{Yes}}&lt;br /&gt;
|{{w|Activated carbon}} is a form of carbon commonly used to filter contaminants from water and air, as it has a large surface area available to adsorb impurities on its surface. While this isn't a strange step to see in a water purification process, Randall makes a pun here with its proximity to the neutron source - the carbon has been '{{w|Neutron activation|activated}}' by the neutron source, and is currently radioactive. Water filtered through this may pick up radioactive isotopes from the filter. This is one of the few steps in this process that definitely fits the comic title of &amp;quot;Water Filtration.&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|Gamma Ray Sterilization&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|Similar to x-ray sterilization, this step uses {{w|Sterilization (microbiology)#Ionizing radiation sterilization|gamma rays}} to sterilize the water. Gamma rays can potentially irradiate the water through photodisintegration if their energy is higher than the binding energy of oxygen.&lt;br /&gt;
|-&lt;br /&gt;
|Cosmic Ray Sterilization&lt;br /&gt;
|{{No|Fake}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|Similar to the previous step, but this time using high energy {{w|cosmic rays}} to do so. This would be incredibly impractical, as cosmic rays are generally blocked by the atmosphere at high altitudes (as stated in the title text). Furthermore, their extremely high energy (shown to be in the exa-electron volt (EeV, or 10&amp;lt;sup&amp;gt;18&amp;lt;/sup&amp;gt; eV) range) would cause multiple high-energy particles to be created on impact with the water molecules, irradiating the water significantly.&lt;br /&gt;
|-&lt;br /&gt;
|Electrolysis&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|The water is broken down into hydrogen and oxygen gas using an electric current. Assuming the gas outputs of this process are pure hydrogen and oxygen gas, this *would* be an extremely effective sterilization tactic, seeing as no known organism or water pollutant is entirely composed out of hydrogen or oxygen gas. Along with the next few steps, this step may be a misguided attempt to &amp;quot;take the water apart and clean each part individually&amp;quot;. The hydrogen is sent to the ionizer, while the oxygen is sent to the oxygen spallation step.&lt;br /&gt;
|-&lt;br /&gt;
|Oxygen Spallation&lt;br /&gt;
|{{No|Fake}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|Almost all oxygen in existence was originally created via {{w|stellar nucleosynthesis}}. Now, in this step in the purification, the oxygen is apparently broken down back into hydrogen via a fictional form of {{w|Cosmic_ray_spallation|spallation}}. While spallation can form lighter nuclei from heavier ones, there is no known process to convert oxygen back down to hydrogen. It is unclear what happens to the neutrons present in the oxygen nuclei - whether they are removed, used to create hydrogen isotopes or allowed to decay into protons and electrons (the components of yet more hydrogen, when properly reintroduced). The hydrogen formed here is merged with the rest of the hydrogen before being sent to the ionizer.&lt;br /&gt;
|-&lt;br /&gt;
|Ionizer&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|The hydrogen output by the previous step is made into a plasma with free electrons and protons (not bound into atoms).&lt;br /&gt;
|-&lt;br /&gt;
|Quark-Gluon Plasma Chamber&lt;br /&gt;
|{{No|Fake}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|The plasma output from the previous step is further energized into a {{w|quark–gluon plasma}}, such as the one found just after the Big Bang. This follows the theme of the previous steps, which all serve to break the water down into their elementary components. The incredible energies involved in doing so are unachievable by current technologies (current particle accelerators can form such a plasma for very short periods of time and involve a very small amount of matter), and serve to highlight the impracticality of this setup (as alluded to in the title text). The energies would also result in formation of lepton pairs from energy, which is presumably where the electrons from the previous step ended up.&lt;br /&gt;
|-&lt;br /&gt;
|Hydrogenation&lt;br /&gt;
|style=&amp;quot;background:#FFFF9E;vertical-align:middle;text-align:{{{align|center}}};{{{style|}}}&amp;quot; class=&amp;quot;table-yes&amp;quot;|Kinda&lt;br /&gt;
|{{No}}&lt;br /&gt;
|This process converts the quark-gluon plasma output in the previous step into elemental hydrogen, reversing the previous two steps. Presumably, this is done via {{w|hadronization}} and {{w|recombination}}; however, it is unclear how the {{w|baryon asymmetry}} needed to generate matter and not anti-matter is developed. The resulting hydrogen is split into 2 streams leading into the Nucleosynthesis and Reverse Electrolysis steps. In real life, {{w|hydrogenation}} is the process of adding hydrogen to unsaturated hydrocarbons. &lt;br /&gt;
|-&lt;br /&gt;
|Nucleosynthesis&lt;br /&gt;
|{{No|Fake}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|Part of the hydrogen produced in the previous step is converted into oxygen via 2 sub-processes. The hydrogen is first converted into helium and carbon through a combination of the {{w|proton-proton chain}} and the {{w|CNO cycle}} as per the labels on the step. The helium and carbon are then converted into oxygen through the {{w|alpha process}}. This step may also involve the {{w|triple-alpha process}}, seeing that the alpha process is typically only applicable to converting carbon into heavier elements owing to the lack of a stable element with eight nucleons. These steps normally occur in the cores of massive stars. It is not known how the oxygen is filtered from the extremely hot plasma of fusion products.&lt;br /&gt;
|-&lt;br /&gt;
|Reverse Electrolysis&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{No}}&lt;br /&gt;
|This step is essentially a fuel cell, utilizing an electrochemical reaction to convert hydrogen and oxygen back into water and electricity.&lt;br /&gt;
|-&lt;br /&gt;
|Adding Well Water&lt;br /&gt;
|{{Yes|Real}}&lt;br /&gt;
|{{Yes}}&lt;br /&gt;
|A second pipe is linked to the first that simply feeds untreated well water into the pipes, partially undoing the entire process. Even if the well water is only a small portion of the faucet water, its presence has now made the now incredibly pure water impure. This act of putting well water into the faucet after treating it may be a riff on the cultural interest in &amp;quot;spring water&amp;quot; or &amp;quot;pure glacial water&amp;quot; that is said to have additional minerals or beneficial properties but is oftentimes not meaningfully distinct from properly treated tap water. &amp;quot;Local minerals and probiotics added&amp;quot; may be a reference to Coke's &amp;quot;Dasani&amp;quot; brand drinking water, which is purified by reverse osmosis, and then has a package of minerals added to create the flavor (pure water's actual lack of flavor can be perceived as an unpleasantly 'flat' flavor).&lt;br /&gt;
&lt;br /&gt;
In addition, drinking only {{w|Tonicity|extremely hypotonic}} liquid intake can induce the body to expel more water than it took in (taking with it some essential minerals that are not being replaced) to try to maintain equilibrium of concentrations. This effect is not directly dangerous, but could exacerbate other bodily deficiencies in the long term and have the issues of greater than necessary liquid throughput than with 'normal' drinking water. The tendency for {{w|Sports drink#Categories|many 'sports' or 'health' drinks}} to hype the term 'isotonic' is based upon the idea that an ideal concentration of solutes can be added, in-between the opposing problems of having either too many ''or'' too few 'impurities'. The process does not include adding untreated (and probably also untested/unquantified) ground water, which could carry pathogenic organisms and chemicals, and appears to have no mechanism for ensuring what ''might'' be an acceptable level of re-blending for the circumstances.&lt;br /&gt;
&lt;br /&gt;
Alternatively, it may be that the level of purity achieved by this setup is so overkill, and the cost per liter processed so high, that it's simply more efficient to treat just enough of the water to dilute the rest of the water to acceptable levels of contaminants. For example, it's common to use a partial bypass to supply water to the shower, since shower water does not need to be potable. Also, some well water systems are clean enough to not need any treatment at all and can be used straight from the well, and some water systems are only slightly high in a single chemical contaminant that can be addressed by blending the water, either with treated water or another source (treated or untreated). Perhaps the treatment process led to enough radioactivity that blending with the original source was required to address radiological contamination (either gross alpha radiation or specific radionuclides).&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text briefly covers the cost implications of the components. Various 'real' filter elements will have material or energy costs or both, in operation or to replenish their effectiveness, and the high energy input needed to disassociate hadrons into raw quark–gluon plasma (at bulk levels) would seem to require the most in terms of running the equipment. But it is pointed out that to ''ensure'' enough cosmic rays reach that particular phase of sterilization, there would have to be a pipe (not shown) leading out to the edge of the atmosphere to optimistically carry down such particles (due to also containing ''no'' air, i.e., keeping it out to negate the normal {{w|Air shower (physics)|shielding and dissipating effect}} of the atmosphere on cosmic rays). However, this pipe would not only be a flight hazard, but also to ensure that no air molecules get in, the pipe would have to be similar to a space elevator, which would wreak a lot of havoc on LEO and MEO.&lt;br /&gt;
Whether a one-off cost or needing regular replacement, the setting up of such a tubular structure (a vertical air-proof pipe perhaps somewhere between 100 and 10000 kilometers high) would be technically challenging and has not ever been actually accomplished. The conditions for a quark–gluon plasma, albeit in limited quantities, at least have been fulfilled at {{w|CERN}}, with its 27 kilometer airless pipe that goes round within a vast circular tunnel.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Header:]&lt;br /&gt;
:How Water Filtration Works&lt;br /&gt;
&lt;br /&gt;
:[A system of various devices between water pipes is shown.]&lt;br /&gt;
:[Input:]&lt;br /&gt;
:Well water&lt;br /&gt;
:[Labels of various devices:]&lt;br /&gt;
:Water softener&lt;br /&gt;
:Reverse osmosis&lt;br /&gt;
:Ultraviolet sterilization&lt;br /&gt;
:Autoclave&lt;br /&gt;
:Condenser&lt;br /&gt;
:Regular osmosis&lt;br /&gt;
:X-ray sterilization&lt;br /&gt;
:Carbon filter&lt;br /&gt;
:Neutron source&lt;br /&gt;
:Activated carbon filter&lt;br /&gt;
:Gamma ray sterilization&lt;br /&gt;
:Cosmic ray sterilization [On the device: &amp;quot;EeV γ&amp;quot;]&lt;br /&gt;
:Electrolysis [H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O split into O and H]&lt;br /&gt;
:Oxygen spallation [O becomes H]&lt;br /&gt;
:Ionizer [H split into + and -]&lt;br /&gt;
:Quark-gluon plasma chamber [+ and - become QGP]&lt;br /&gt;
:Hydrogenation [QGP becomes H]&lt;br /&gt;
:Nucleosynthesis [H goes through &amp;quot;P-P CNO&amp;quot; and becomes He and C, then through &amp;quot;Alpha&amp;quot; and becomes O]&lt;br /&gt;
:Reverse electrolysis&lt;br /&gt;
:[Output after devices:]&lt;br /&gt;
:Pure water&lt;br /&gt;
:[Second input, mixed with pure water:]&lt;br /&gt;
:Well water&lt;br /&gt;
:[Label:]&lt;br /&gt;
:Local minerals and probiotics added for taste and to support immune health&lt;br /&gt;
:[Final output:]&lt;br /&gt;
:To faucet&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Comics with lowercase text]]&lt;br /&gt;
[[Category:Chemistry]]&lt;br /&gt;
[[Category:Physics]]&lt;br /&gt;
[[Category:Engineering]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2788:_Musical_Scales&amp;diff=353202</id>
		<title>2788: Musical Scales</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2788:_Musical_Scales&amp;diff=353202"/>
				<updated>2024-10-18T18:29:25Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2788&lt;br /&gt;
| date      = June 12, 2023&lt;br /&gt;
| title     = Musical Scales&lt;br /&gt;
| image     = musical_scales_2x.png&lt;br /&gt;
| imagesize = 326x222px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = In the Hall of the Mountain King was accidentally composed on log/log paper.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
In {{w|Musical_notation#Modern_staff_notation|standard Western musical notation}}, the horizontal position of a note indicates its relative temporal position in the piece, and the vertical position of a note denotes &amp;lt;!-- no pun intended, honest --&amp;gt; its pitch; but the pitch is really a logarithm of the note's frequency (every octave/seven named notes/12 semitones/13 named notes including accidentals equals a doubling of frequency), so it's a semi-log plot of sorts.  The comic thus explores what a notation would look like if the horizontal axis behaved this way instead. Likewise, the vertical axis has been rendered linearly by frequency, with the normally equally-set lines on a normal musical staff stretching to compensate for the increasing jumps between pitches.&lt;br /&gt;
&lt;br /&gt;
[[File:SimpleGifts.png|thumb|The nonstandard music notation depicted in the comic is the opening five measures of &amp;quot;{{w|Simple Gifts}}&amp;quot; ([https://upload.wikimedia.org/wikipedia/commons/1/16/Simple_Gifts_-_Pendyrus_Choir-cory_Band.ogg listen.])]]&lt;br /&gt;
&lt;br /&gt;
[[Randall]] may have mistakenly assumed that the lines of a music stave represent a linear increase in pitch and thus an exponential increase in frequency. He has thus mapped them onto a logarithmic scale by doubling the space between each successive line of the stave - one space between the bottom two lines, then two spaces, then four, then eight. In fact, the lines and the spaces between them correspond to notes in the C Major scale, which have unequal gaps between them. It is also possible that he is aware of this small inaccuracy and chose to ignore it in the name of humor.&lt;br /&gt;
&lt;br /&gt;
The title text purports to explain how {{w|In the Hall of the Mountain King}}, which progressively increases in tempo/speed and intensity from an initially subtle start into a rapid hustle towards a series of crescendos at the end, was written on {{w|Log–log plot|log-log paper}}, that features nonlinear expansion in ''both'' its axes (in order to render various exponential graphs linear, often for the purposes of ease of understanding). Rather than these features being a deliberate composition decision, this says that they're only the result of how it was written down, or thenceforth read. The accident would have to be that music was originally written ''as though'' for log-log paper, using shorter notes as the piece went on, intended to have consistent actual durations throughout the piece—and then ''interpreted'' on a linear time scale, such that the later notes actually had shorter durations, speeding up the piece.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[The sheet music for &amp;quot;Simple Gifts&amp;quot; on a distorted staff.]&lt;br /&gt;
:[Caption below the panel]:&lt;br /&gt;
:When transcribing music, remember to put ''frequency'' on a log scale and ''time'' on a linear one, not the other way around.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Music]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2956:_Number_Line_Branch&amp;diff=353201</id>
		<title>2956: Number Line Branch</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2956:_Number_Line_Branch&amp;diff=353201"/>
				<updated>2024-10-18T18:28:57Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2956&lt;br /&gt;
| date      = July 8, 2024&lt;br /&gt;
| title     = Number Line Branch&lt;br /&gt;
| image     = number_line_branch_2x.png&lt;br /&gt;
| imagesize = 469x235px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Attention all passengers: This is an express sequence to infinity. If your stop is not a power of two, please disembark now.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic likens the {{w|number line}} to a line of a railroad or subway system. These often have branches where different trains continue on to a different destination, with different stops along the way, or travel on parallel lines to allow faster trains to bypass slower ones. In the number line, one branch (presumably the original) contains ordinary integers, while the newly opened branch consists of some completely different numbers, denoted with various symbols as an analogue to those we use as digits. The branches seem to split around π. The new branch maintains the same distance between numbers as the 'normal' one (as far as it goes) but, due to a longer initial curve away from the junction, the digits of the new branch are also consistently offset slightly to the left from the horizontal positions of the respective digits of the normal branch.&lt;br /&gt;
&lt;br /&gt;
The new branch ending with a bold mark at Δ (whereas the original number line fades out after 10) suggests that it is the end of this branching sequence. Mathematicians, apparently, could only afford to construct 5 additional numbers, or their research hasn't yet found other numbers. The branch may have been intended to run much further, but it was possibly {{w|High Speed 2#Cancellation of Phase 2, October 2023|scaled back}} due to budget overruns and cutbacks.&lt;br /&gt;
&lt;br /&gt;
The title text makes a parallel between a train stopping at a station and a numerical sequence &amp;quot;stopping&amp;quot; at a number – that is, taking it as a value. It's a spoof of announcements that are typically made on trains, so that passengers can confirm that they're on a train that goes to their desired station; an &amp;quot;express train&amp;quot; typically makes fewer stops so it can serve the most popular stops and reach its final destination sooner. In this case, the express train only stops at powers of 2; presumably the &amp;quot;local&amp;quot; train stops at every integer. Powers of 2 are 2, 4, 8, 16, 32, ..., 2&amp;lt;sup&amp;gt;n&amp;lt;/sup&amp;gt;, such that the interval between stops grows exponentially larger.&lt;br /&gt;
&lt;br /&gt;
Mathematically, an express train like this would get to its scheduled stops much faster, but it would not actually have any fewer stops overall. Mathematicians that study infinities generally regard all &amp;quot;{{w|Countable_set|countably}}&amp;quot; infinite sets as being the same size (containing the same number of elements). Infinity is not a fixed value; rather, it's the concept of &amp;quot;does not end&amp;quot;, so it's paradoxical to try to take a train to a destination that is, by definition, not a single destination. By way of analogue, it's akin to promising to stop hitting your little brother only after you've done so forever.&lt;br /&gt;
&lt;br /&gt;
This same property of infinite numbers (that all countably infinite sets are the same size) also means that adding the new branch does not increase how many numbers the system can handle. This is similar to the phenomenon of {{w|induced demand}} in transit, where expanding the capacity for a road or train system frequently results in demand rising back up to capacity, becoming just as congested as it was before.&lt;br /&gt;
&lt;br /&gt;
A fictional number was previously shown in [[899: Number Line]] (&amp;quot;gird&amp;quot;), and fictional &amp;lt;em&amp;gt;numerals&amp;lt;/em&amp;gt; were shown in [[2206: Mavis Beacon]]. Similar treatment of mathematics as public infrastructure was seen in [[2735: Coordinate Plane Closure]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A diagram reminiscent of both the number line and a transit system diagram. The line starts at the left and goes right through points labeled 0, 1, 2, and 3, at which point there is a split into two branches. The top branch continues: 4, 5, 6, 7, 8, 9, 10, …. The bottom branch is shorter, labeled with five curious glyphs: a square, a near-vertical line with two short horizontal lines jutting out from it, a phi-like/lollipop symbol, a spiral, and a delta/triangle symbol.]&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Good news!&lt;br /&gt;
:After thousands of years, mathematicians have finally opened a second branch on the number line to reduce congestion.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Math]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2938:_Local_Group&amp;diff=353198</id>
		<title>2938: Local Group</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2938:_Local_Group&amp;diff=353198"/>
				<updated>2024-10-18T17:40:00Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2938&lt;br /&gt;
| date      = May 27, 2024&lt;br /&gt;
| title     = Local Group&lt;br /&gt;
| image     = local_group_2x.png&lt;br /&gt;
| imagesize = 547x266px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Cosmologists estimate the spaghetti strand to be about 200 septillion calories, though it could be higher depending on the nutritional value of dark matter.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
In {{w|Timeline_of_the_far_future|less than 5 billion years}} into the future, the {{w|Andromeda Galaxy}} is expected to {{w|Andromeda–Milky Way collision|collide}} with the {{w|Milky Way}}. This comic suggests this will happen when both galaxies get into a kissing distance after having slurped the same cosmic spaghetti strand. This is a spoof of a famous scene in the movie ''{{w|Lady and the Tramp}}'', where the titular dogs are eating spaghetti at an Italian restaurant. They happen to be eating the same strand from opposite ends, so they end up meeting in the middle and kissing. This scene was mentioned before in [[2612: Lightsabers]], and {{tvtropes|SpaghettiKiss|has been referenced extensively in other media}}.&lt;br /&gt;
&lt;br /&gt;
It's possible that this is also a reference to {{w|Flying_Spaghetti_Monster|Pastafarianism}}, the spoof religion which claims that the universe was created by a &amp;quot;flying spaghetti monster&amp;quot;. If both galaxies are eating one of the deity's &amp;quot;noodly appendages,&amp;quot; they may be doing what the monster wishes, since one of the religion's holidays is about eating lots of pasta.&lt;br /&gt;
&lt;br /&gt;
The title text figure of 200 septillion (2×10&amp;lt;sup&amp;gt;26&amp;lt;/sup&amp;gt;) calories for the Milky Way-Andromeda noodle equates to approximately 2500 calories per foot of noodle. This value makes sense only if Randall is referring to the physics/chemistry {{w|Calorie|&amp;quot;small&amp;quot; calorie}} (= 4.184 joules) rather than the dietary {{w|Calorie|&amp;quot;large&amp;quot; Calorie}} (= 4184 joules). Dietary Calories, also called kilocalories (kcal), would be the usual meaning in a food-related context like this one, but Randall was trained as a physicist and apparently used the small calorie here. Having 2.5 dietary Calories per foot is roughly correct for a noodle size between thin spaghetti and angel hair. A noodle with similar ingredients and 2,500 dietary calories per foot would be roughly 26 centimeters in diameter, and might more properly be considered a type of pastry.&lt;br /&gt;
&lt;br /&gt;
The nutritional value of dark matter refers to the fact that evidence of 'dark matter' is particularly found in [https://www.nature.com/articles/nature11224 cosmic filaments] and the [https://www.space.com/dark-matter-detected-cosmic-web-filaments-universe-evolution-subaru-telescope cosmic web], implying that such &amp;quot;cosmic spaghetti&amp;quot; would have an appreciable amount of dark matter &amp;quot;sauce&amp;quot; on it. But, because the exact nature of dark matter is unknown, it is likely even more difficult to identify the calorific content that it might provide. Note that these {{w|galactic filament|filaments}} are much larger structures than the {{w|Local Group}} of galaxies that includes the Milky Way and Andromeda.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Two galaxies, positioned on the bottom left and top right sides of the panel, are each eating a single noodle of spaghetti, originating from a bowl of spaghetti in between them.]&lt;br /&gt;
:[Bottom left galaxy:] ''Sluuurp''&lt;br /&gt;
:[Top right galaxy:] ''Sluuurp''&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Astronomers have determined that the Milky Way and Andromeda are currently slurping up the same strand of cosmic spaghetti, suggesting that in 5 billion years they will likely kiss.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Astronomy]]&lt;br /&gt;
[[Category:Food]]&lt;br /&gt;
[[Category:Cosmology]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2938:_Local_Group&amp;diff=353197</id>
		<title>2938: Local Group</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2938:_Local_Group&amp;diff=353197"/>
				<updated>2024-10-18T17:39:25Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2938&lt;br /&gt;
| date      = May 27, 2024&lt;br /&gt;
| title     = Local Group&lt;br /&gt;
| image     = local_group_2x.png&lt;br /&gt;
| imagesize = 547x266px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Cosmologists estimate the spaghetti strand to be about 200 septillion calories, though it could be higher depending on the nutritional value of dark matter.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
In {{w|Timeline_of_the_far_future|less than 5 billion years}} into the future, the {{w|Andromeda Galaxy}} is expected to {{w|Andromeda–Milky Way collision|collide}} with the {{w|Milky Way}}. This comic suggests this will happen when both galaxies get into a kissing distance after having slurped the same cosmic spaghetti strand. This is a spoof of a famous scene in the movie ''{{w|Lady and the Tramp}}'', where the titular dogs are eating spaghetti at an Italian restaurant. They happen to be eating the same strand from opposite ends, so they end up meeting in the middle and kissing. This scene was mentioned before in [[2612: Lightsabers]], and {{tvtropes|SpaghettiKiss|has been referenced extensively in other media}}.&lt;br /&gt;
&lt;br /&gt;
It's possible that this is also a reference to {{w|Flying_Spaghetti_Monster|Pastafarianism}}, the spoof religion which claims that the universe was created by a &amp;quot;flying spaghetti monster&amp;quot;. If both galaxies are eating one of the deity's &amp;quot;noodly appendages,&amp;quot; they may be doing what the monster wishes, since one of the religion's holidays is about eating lots of pasta.&lt;br /&gt;
&lt;br /&gt;
The title text figure of 200 septillion (2×10&amp;lt;sup&amp;gt;26&amp;lt;/sup&amp;gt;) calories for the Milky Way-Andromeda noodle equates to approximately 2500 calories per foot of noodle. This value makes sense only if Randall is referring to the physics/chemistry {{w|Calorie|&amp;quot;small&amp;quot; calorie}} (= 4.184 joules) rather than the dietary {{w|Calorie|&amp;quot;large&amp;quot; Calorie}} (= 4184 joules). Dietary Calories, also called kilocalories (kcal), would be the usual meaning in a food-related context like this one, but Randall was trained as a physicist and apparently used the small calorie here. Having 2.5 dietary Calories per foot is roughly correct for a noodle size between thin spaghetti and angel hair. A noodle with similar ingredients and 2,500 dietary calories per foot would be roughly 26 centimeters in diameter, and might more properly be considered a type of pastry.&lt;br /&gt;
&lt;br /&gt;
The nutritional value of dark matter refers to the fact that evidence of 'dark matter' is particularly found in [https://www.nature.com/articles/nature11224 cosmic filaments] and the [https://www.space.com/dark-matter-detected-cosmic-web-filaments-universe-evolution-subaru-telescope cosmic web], implying that such &amp;quot;cosmic spaghetti&amp;quot; would have an appreciable amount of dark matter &amp;quot;sauce&amp;quot; on it. But, because the exact nature of dark matter is unknown, it is likely even more difficult to identify the calorific content that it might provide. Note that these {{w|galactic filament|filaments}} are much larger structures than the {{w|Local Group}} of galaxies that includes the Milky Way and Andromeda.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[Two galaxies, positioned on the bottom left and top right sides of the panel, are each eating a single noodle of spaghetti, originating from a bowl of spaghetti in between them.]&lt;br /&gt;
:[Left galaxy:] ''Sluuurp''&lt;br /&gt;
:[Right galaxy:] ''Sluuurp''&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Astronomers have determined that the Milky Way and Andromeda are currently slurping up the same strand of cosmic spaghetti, suggesting that in 5 billion years they will likely kiss.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Astronomy]]&lt;br /&gt;
[[Category:Food]]&lt;br /&gt;
[[Category:Cosmology]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2947:_Pascal%27s_Wager_Triangle&amp;diff=352942</id>
		<title>2947: Pascal's Wager Triangle</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2947:_Pascal%27s_Wager_Triangle&amp;diff=352942"/>
				<updated>2024-10-15T14:35:36Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2947&lt;br /&gt;
| date      = June 17, 2024&lt;br /&gt;
| title     = Pascal's Wager Triangle&lt;br /&gt;
| image     = pascals_wager_triangle_2x.png&lt;br /&gt;
| imagesize = 740x802px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = In contrast to Pascal's Wager Triangle, Pascal's Triangle Wager argues that maybe God wants you to draw a triangle of numbers where each one is the sum of the two numbers above it, so you probably should, just in case.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
The comic is a conflation of {{w|Pascal's Wager}} and {{w|Pascal's Triangle}}. It's structured as a layout that emulates Pascal's triangle, an infinite triangle of numbers where the top number is 1 and each value below is the sum of the adjacent number(s) above it. The second row has two 1s (each the sum of the single 1 above), and the third row has a 1 (the sum of a single 1 in the second row), a 2 (the sum of both 1s above it), and another 1, and so on. It plays important roles in binomial expansion, probability theory, and other areas of math. While {{w|Blaise Pascal}} did not invent the triangle, it is named after him (an example of {{w|Stigler's law of eponymy}}).&lt;br /&gt;
&lt;br /&gt;
&amp;lt;center&amp;gt;&lt;br /&gt;
{|style=&amp;quot;text-align: center; vertical-align: bottom; border: none;&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
|colspan=5| &lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''seed''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=5| &lt;br /&gt;
|-&lt;br /&gt;
|colspan=4| &lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''… + 1''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''1 + …''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=4| &lt;br /&gt;
|-&lt;br /&gt;
|colspan=3| &lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''… + 1''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''1 + 1''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''2'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''1 + …''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=3| &lt;br /&gt;
|-&lt;br /&gt;
|colspan=2| &lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''… + 1''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''1 + 2''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''3'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''2 + 1''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''3'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''1 + …''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=2| &lt;br /&gt;
|-&lt;br /&gt;
|&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''… + 1''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''1 + 3''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''4'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''3 + 3''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''6'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''3 + 1''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''4'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|&amp;lt;span style=&amp;quot;color: #CCC&amp;quot;&amp;gt;''1 + …''&amp;lt;/span&amp;gt;&amp;lt;br/&amp;gt;'''1'''&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40px;&amp;quot;|…&lt;br /&gt;
|&lt;br /&gt;
|-&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40x;&amp;quot;|&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40x;&amp;quot;|⋮&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40x;&amp;quot;|⋮&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40x;&amp;quot;|⋮&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40x;&amp;quot;|⋮&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40x;&amp;quot;|⋮&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40x;&amp;quot;|⋮&lt;br /&gt;
|colspan=2 style=&amp;quot;width: 60px; height: 40x;&amp;quot;|&lt;br /&gt;
|}&lt;br /&gt;
&amp;lt;/center&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Pascal's Wager is a philosophical argument proposed by the same Pascal. Essentially it says that if God exists, both the rewards for believing in God and the punishment for nonbelief are infinite; if not, the cost of belief and benefit for nonbelief are negligible. Therefore, if there is a finite possibility that God exists, however small, one should believe in God. One problem with that is that there may be more than one God to believe in, even if only one truly exists. Which one of all the possible Gods should you choose to believe in could be problematic, if the real God insists that you only believe in Him and punishes you for believing in any other gods (even if you somehow also believed in Him). A further problem is that committing to any particular belief in a deity is not a totally zero cost option, and thus affects your life in many needless ways if you subscribe to any particular practice of religion not actually required by any extant god(s), even if any of them exist in the first place.&lt;br /&gt;
&lt;br /&gt;
The comic merges the two Pascalian concepts: each Cueball is wagering his proof of a god or gods to the Cueballs below him, thereby creating Cueballs that believe in the sum of the number of gods of the Cueballs above them. In the second row, the two Cueballs each believe in one god, as intended by the original Cueball. However, in the third row, the Cueball in the middle interprets the two proofs offered to him as proving the existence of two gods. Theoretically, this expansion would continue for all integers as the triangle grows, giving rise to a belief in escalating numbers of gods going down and towards the middle of the triangle. This is clearly not the intent of the first Cueball, who simply offered a proof of his one god, but he has no control over the situation below him. &lt;br /&gt;
&lt;br /&gt;
It is unclear why the Cueballs behave in this fashion, instead of treating all the proofs as proving the existence of the same god. Perhaps each one rewords their arguments for god(s) sufficiently to make them sound different than other gods. This is not without precedent. Scholars of comparative mythology believe that the religion of Proto-Indo-European peoples splintered into many disparate religions of Europe and West Asia; for instance, {{w|%2ADy%C4%93us#%22Sky-Father%22_epithet|Dyeus phter}} (sky father) became Zeus in Greece and Jupiter in Italy.&lt;br /&gt;
&lt;br /&gt;
This comic may be referencing a common counterargument to Pascal's Wager — that it works equally well for ''any'' hypothetical god which offers eternal paradise for one action and eternal damnation otherwise. This can even include hypothetical gods with contradictory criteria for entrance into paradise. In this case, the Cueballs apparently chose to believe in all the deities they've heard of in order to cover their bases.&lt;br /&gt;
&lt;br /&gt;
The title text suggests that everyone should draw a proper Pascal's Triangle, since there is a possibility that God wants you to do so, and if they do then the benefits of pleasing God or the costs of displeasing God could be high, whereas if they have no such desire then there is minimal cost to drawing one anyway. The failing of this logic is that God may have a positive preference for you ''not'' to draw a Pascal's Triangle (though at least according to the Catholic Church this is unlikely, as Pascal himself is on the way to {{w|beatification}}.)&lt;br /&gt;
&lt;br /&gt;
Pascal's Wager was previously mentioned in the title text of [[525: I Know You're Listening]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Cueballs, each holding some document, are shown in a triangular arrangement, with arrows pointing from upper to lower Cueballs:]&lt;br /&gt;
:[At the top, row 1 has a Cueball, unnamed but described below as &amp;quot;C1&amp;quot;, holding a piece of paper with a crossed-square shape possibly resembling a Punnet Square diagram and with a speech-bubble]&lt;br /&gt;
:C1: Hey, you two below me! Here's a proof that you should believe in my god!&lt;br /&gt;
:[Two arrows lead diagonally down-left and down-right from C1 to the second row, having two similarly drawn Cueballs (differing only by slight changes in pose) described here as &amp;quot;C2&amp;quot; and &amp;quot;C3&amp;quot;]&lt;br /&gt;
:C2 &amp;amp; C3: I'm convinced! Hey, you two below me! Here's a proof that you should believe in my god!&lt;br /&gt;
:[Two arrows lead down from each of Row 2's Cueballs to three similar Cueballs on Row 3, &amp;quot;C4&amp;quot;, &amp;quot;C5&amp;quot; and &amp;quot;C6&amp;quot;, the central Cueball being the target of arrows from both of the predecessors, and the speech-bubbles partly obscuring the predecessor Cueballs and the lines of the arrows]&lt;br /&gt;
:C4 &amp;amp; C6: I'm convinced! Hey, you two below me! Here's a proof that you should believe in my god!&lt;br /&gt;
:C5: Ok, I believe you both! Hey, you two below me! Here's a proof that you should believe in my '''two''' gods!&lt;br /&gt;
:[Two further arrows lead down from each Row 3 Cueball to a total of four Row 4 Cueballs, all but the edge ones having two incoming arrows, &amp;quot;C7&amp;quot; to &amp;quot;C10&amp;quot;]&lt;br /&gt;
:C7: I'm convinced! Hey, you two below me! Here's a proof that you should believe in my god!&lt;br /&gt;
:C8 &amp;amp; C9: Ok, I believe you both! Hey, you two below me! Here's a proof that you should believe in my '''three''' gods!&lt;br /&gt;
:[C10 has no visible bubble, as there is no room for one in-frame, and is itself also slightly obscured by C9's bubble, but would logically be considered to have a &amp;quot;believe in my (singular) god&amp;quot; monologue]&lt;br /&gt;
:[Continuing the pattern, Row 5 has &amp;quot;C11&amp;quot; to &amp;quot;C15&amp;quot; Cueballs (with only a small amount of leg visible above the lower edge of the comic frame), each is led to by diagonal arrow(s) originating from the Row4 Cueballs]&lt;br /&gt;
:[C11 and C15 have no visible speech bubbles, due to being even more edge-adjacent and C15 even reaching off the edge of the frame with his 'punnet paper', but can be assumed to have a &amp;quot;believe in my god&amp;quot; statement]&lt;br /&gt;
:C12 &amp;amp; C14: Ok, I believe you both! Hey, you two below me! Here's a proof that you should believe in my '''four''' gods!&lt;br /&gt;
:C13: Ok, I believe you both! Hey, you two below me! Here's a proof that you should believe in my '''six''' gods!&lt;br /&gt;
:[No further arrows or Cueballs can be visible, and no further speech-bubbles obscure Row 5, but without any reason to believe they aren't just off frame]&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Pascal's Wager Triangle&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Multiple Cueballs]]&lt;br /&gt;
[[Category:Math]]&lt;br /&gt;
[[Category:Religion]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352937</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352937"/>
				<updated>2024-10-15T14:00:58Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - Ideally the article would contain grounded explanations of both of the views that bulging lithium batteries are either dangerous or safe. What gas builds up? How would an explosion happen, or why would it not? Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{{w|Ravioli}} are a kind of stuffed pasta comprising a filling enveloped in thin pasta dough, commonly square shaped, and serving as the object of this comic's confusion matrix. This comic compares 4 'ravioli-shaped' objects (square shaped objects with bulging cross-sections due to their filling) with common actions associated with them.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|Ravioli pasta would indeed be suitable to be eaten with a fork, as shown.&lt;br /&gt;
|Ravioli pasta is not structurally strong enough to support the weight of a human head while reclining and would break and spill its filling over your head and the object one is resting on.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|If the ravioli filling is thin enough, one could slurp it out with a straw.&lt;br /&gt;
|Phones are not meant to run on ravioli.{{citation needed}} Stuffing a phone with a raviolo would cause it to break as shown, spilling the filling through the phone, which is a terrible idea.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw pillow}}&lt;br /&gt;
|Throw pillows are made of cloth and are inedible, whether one uses a fork or not.&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|A throw pillow is meant to be used as head support while reclining on furniture.&lt;br /&gt;
|Throw pillows do not have liquids inside them. Hence, Cueball finds, to his dismay, that they're empty.&lt;br /&gt;
|Throw pillows are significantly bigger than phones and as such can't fit inside them, nor power them. However, the 'installation' depicted, with the phone resting on the pillow, does not seem particularly harmful, and may be somewhat protective, so it's unclear why this square is red, rather than at least yellow.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|Eating a Capri Sun, a pouch of sweetened juice, with a fork would most likely simply pierce the pouch and spill the liquid all over Cueball.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A Capri Sun would serve as a waterbed of sorts, and wouldn't be unduly uncomfortable in a pinch. However, it's still possible that the pouch could rupture and leave you with a sticky head and no support.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|Capri Suns are meant to be drunk like this, and are enjoyed by many.&lt;br /&gt;
|The phone shown is surrounded by spilled Capri Sun, implying that the attempt to force the two together punctured the pouch. The resulting spillage would most likely just result in the surface of the phone becoming annoyingly sticky, but if the liquid managed to get inside the phone (especially if the cover had been removed to try to put it 'in' the compartment that usually holds the battery) it could cause a more significant and difficult to clean mess. Once actual power is provided (either an actual battery being subsequently used or the device offered external power by cable or inductance charger), the remaining residue could cause any number of further faults, and perhaps even critical component damage.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|Bulging lithium batteries are explosive hazards and should not be punctured lest they explode. Additionally the contents of the battery are toxic if one were to somehow manage to eat the burning bits of the battery.&lt;br /&gt;
|A lithium battery is a small, hard object, and a bulging one is no exception. Since the bulging comes from a buildup of heat and gas, it would also be a constant fire hazard, which would not be conducive to relaxation.{{cn}} Lithium battery themed throw pillows, which bulge similarly to such batteries, do exist as a novelty item. Notably, these types of batteries are often referred to as &amp;quot;spicy pillows&amp;quot;.&lt;br /&gt;
|Similarly to the 'eat with a fork' example, puncturing a bulging lithium battery is a bad idea.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|A bulging lithium battery could be installed in a phone, if one is willing to break the phone a bit (like the screen in the comic) to accommodate the bulging of the battery. Also a terrible idea, as operating the lithium battery in this condition may result in the battery [https://www.reading.ac.uk/health-safety-services/fire-safety/lithium-battery-information/i-have-a-swollen-lithium-ion-battery-what-should-i-do catching fire or worse]. More commonly, bulging batteries form inside the phone itself, causing it to bulge outwards.&lt;br /&gt;
Surprisingly, this square is marked in green rather than &amp;lt;span style=&amp;quot;background-color:#C5E6C3&amp;quot;&amp;gt;red&amp;lt;/span&amp;gt; or &amp;lt;span style=&amp;quot;background-color:#C5E6C3;&amp;quot;&amp;gt;yellow&amp;lt;/span&amp;gt;, as the first thing one should do on noticing bulging of the battery is to uninstall it from any device that it is in. It is at least no longer good at holding/delivering its charge, and may even become at least as {{w|Lithium-ion battery#Fire hazard|hazardous}} as when used in all the other scenarios.&lt;br /&gt;
Perhaps this is an [[:Category:xkcd Phones|xkcd phone]], and these are considered features, such as 'integrated hand warmer' and 'dynamic expansion'.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials, a diamond figure put out by the {{w|National Fire Protection Association}} showing four kinds of fire hazards. A ravioli that touched all four quadrants would be a health hazard, fire hazard, and demonstrate instability, and have some other miscellaneous hazard(s). The NFPA diamond was prevoiously mentioned in [[2638: Extended NFPA Hazard Diamond]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[A 4x4 grid of squares. The columns are labeled: Eat with a fork, rest your head on, puncture and slurp, install in your phone. The rows are: Ravioli, throw pillow, Capri Sun, bulging lithium battery. Each row has an image of each respective item above the title, with the words “Home Sweet Home” on the throw pillow, and “Fruit” on the Capri Sun.]&lt;br /&gt;
&lt;br /&gt;
:Ravioli, eat with a fork: [green]&lt;br /&gt;
::[Cueball sits on a chair in front of a table with a jar of sauce on it. He is eating from a plate from ravioli.]&lt;br /&gt;
::Cueball: ''Nom Nom Nom''&lt;br /&gt;
&lt;br /&gt;
:Ravioli, Rest your head on: [red]&lt;br /&gt;
::[Cueball is lying down on a couch with ravioli smooshed on his head and the couch. Ravioli bits can be seen on the ground]&lt;br /&gt;
::Cueball: Eww.&lt;br /&gt;
&lt;br /&gt;
:Ravioli, puncture and slurp: [yellow]&lt;br /&gt;
::[Cueball is slurping from a ravioli through a straw. In front of him is table with two plates, presumably with ravioli on them.]&lt;br /&gt;
::''Slurp''&lt;br /&gt;
&lt;br /&gt;
:Ravioli, Install in your phone: [red]&lt;br /&gt;
::[A phone is shown with bits of ravioli sticking out and tomato sauce is dripping out.]&lt;br /&gt;
&lt;br /&gt;
:Throw pillow, eat with a fork: [red]&lt;br /&gt;
::[Cueball sits on a chair in front of a table with a jar of sauce on it. He is poking with a fork at a throw pillow covered in tomato sauce.]&lt;br /&gt;
::''Poke poke''&lt;br /&gt;
&lt;br /&gt;
:Throw pillow, rest your head on: [green]&lt;br /&gt;
::[Cueball is looking at his phone and is lying on a couch. His head is resting on a throw pillow.]&lt;br /&gt;
&lt;br /&gt;
:Throw pillow, puncture and slurp: [red]&lt;br /&gt;
::[Cueball is sucking on a straw that is inserted in a pillow.]&lt;br /&gt;
::Cueball: Aw man, this one is empty.&lt;br /&gt;
&lt;br /&gt;
:Throw pillow, install in your phone: [red]&lt;br /&gt;
::[A phone is shown on a throw pillow that has the words “Home Sweet Home” partially obscured.]&lt;br /&gt;
&lt;br /&gt;
:Capri Sun, eat with a fork: [red]&lt;br /&gt;
::[Cueball sits on a chair in front of a table with a jar of sauce on it. He has stabbed a Capri Sun on a plate and is now splattered with juice.]&lt;br /&gt;
&lt;br /&gt;
:Capri Sun, rest your head on: [yellow]&lt;br /&gt;
::[Cueball is looking at his phone and is lying on a couch. His head is resting on a Capri Sun.]&lt;br /&gt;
::Cueball: Honestly kind of comfortable.&lt;br /&gt;
&lt;br /&gt;
:Capri Sun, puncture and slurp: [green]&lt;br /&gt;
::[Cueball is drinking from a Capri Sun through a straw.]&lt;br /&gt;
::''Sluuurp''&lt;br /&gt;
&lt;br /&gt;
:Capri Sun, Install in your phone: [red]&lt;br /&gt;
::[A phone is shown to be squishing a Capri Sun. Juice is trickling out.]&lt;br /&gt;
&lt;br /&gt;
:Bulging lithium battery, eat with a fork: [red]&lt;br /&gt;
::[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
&lt;br /&gt;
:Bulging lithium battery, rest your head on: [red]&lt;br /&gt;
::[Cueball is looking at his phone and lying on his couch. His head is resting on a smoldering battery.]&lt;br /&gt;
::Cueball: This fire hazard is uncomfortable.&lt;br /&gt;
&lt;br /&gt;
:Bulging lithium battery, puncture and slurp: [red]&lt;br /&gt;
::[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
&lt;br /&gt;
:Bulging lithium battery, install in your phone: [green]&lt;br /&gt;
::[A phone with a bulging back, presumably from the bulging lithium battery. The phone’s screen is cracked in the center.]&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Food]]&lt;br /&gt;
[[Category:Phones]]&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352888</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352888"/>
				<updated>2024-10-14T22:40:40Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{{w|Ravioli}} are a kind of stuffed pasta comprising a filling enveloped in thin pasta dough, commonly square shaped, and serving as the object of this comic's confusion matrix. This comic compares 4 'ravioli-shaped' objects (square shaped objects with internal filling) with common actions associated with them.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|Ravioli pasta would indeed be suitable to be eaten with a fork, as shown.&lt;br /&gt;
|Ravioli pasta is not structurally strong enough to support the weight of a human head while reclining and would break and spill its filling over your head and the object one is resting on.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|If the ravioli filling is thin enough, one could slurp it out with a straw.&lt;br /&gt;
|Phones are not meant to run on raviolis{{citation needed}}. Stuffing a phone with a ravioli would cause it to break as shown, spilling the filling through the phone, which is a terrible idea.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw Pillow}}&lt;br /&gt;
|Throw pillows are made of cloth and are inedible, whether one uses a fork or not.&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|A throw pillow is meant to be used as head support while reclining on furniture.&lt;br /&gt;
|Throw pillows do not have liquids inside them. Hence, Cueball finds that they're empty to his dismay.&lt;br /&gt;
|Throw pillows are significantly bigger than phones and as such can't fit inside them, nor power them.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|Eating a Capri Sun with a fork would most likely simply pierce the pouch and spill Capri Sun all over Cueball.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A Capri Sun would serve as a waterbed of sorts, and wouldn't be unduly uncomfortable in a pinch. Its still likely that the pouch could rupture however.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|Capri Suns are meant to be drunk like this, and are enjoyed by many.&lt;br /&gt;
|The Capri Sun shown is surrounded by spilled Capri Sun, implying that the installation punctured the pouch. Needless to say, this would be a terrible item to install in place of a phone battery.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|Bulging Lithium batteries are explosive hazards and are not meant to be punctured lest they explode.&lt;br /&gt;
|A lithium battery is a small, hard object, and a bulging one is no exception. It would also be a constant fire hazard, which would not be conducive to relaxation. Lithium battery themed throw pillows do exist as a novelty item, which bulge similarly to such batteries.&lt;br /&gt;
|Similarly to the 'eat with a fork' example, puncturing a bulging lithium battery is a bad idea.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|A bulging lithium battery could be installed in a phone, if one is willing to break the phone a bit (the screen in the comic) to accommodate the bulging of the battery. Also a terrible idea, as operating the lithium battery in this condition may result in the battery catching fire or worse. More commonly, bulging batteries form inside the phone itself, causing it to bulge outwards. Surprisingly, this square is marked in green rather than red, as the first thing one should do on noticing bulging of the battery is to uninstall it from their device.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials. A ravioli that touched all four quadrants would be a health hazard due to exposure, fire hazard, chemically unstable, and have some other miscellaneous hazard(s).&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[A 5x5 grid of squares. The columns are labeled: Eat with a fork, rest your head on, puncture and slurp, install in your phone. The rows are: Ravioli, throw pillow, Capri Sun, bulging lithium battery. Each row has an image of each respective item above the title.]&lt;br /&gt;
&lt;br /&gt;
:Ravioli, eat with a fork: [green]&lt;br /&gt;
::[Cueball sits on a chair in front of a table with a jar of sauce on it. He is eating from a plate from ravioli.]&lt;br /&gt;
::Cueball: ''Nom Nom Nom''&lt;br /&gt;
&lt;br /&gt;
:Ravioli, Rest your head on: [red]&lt;br /&gt;
::[Cueball is lying down on a couch with ravioli smooshed on his head and the couch. Ravioli bits can be seen on the ground]&lt;br /&gt;
::Cueball: Eww.&lt;br /&gt;
&lt;br /&gt;
:Ravioli, puncture and slurp: [yellow]&lt;br /&gt;
::[Cueball is slurping from a ravioli through a straw. In front of him is table with two plates, presumably with ravioli on them.]&lt;br /&gt;
::''Slurp''&lt;br /&gt;
&lt;br /&gt;
:Ravioli, Install in your phone: [red]&lt;br /&gt;
::[A phone is shown with bits of ravioli sticking out and tomato sauce is dripping out.]&lt;br /&gt;
&lt;br /&gt;
:Throw pillow, eat with a fork: [red]&lt;br /&gt;
::[Cueball sits on a chair in front of a table with a jar of sauce on it. He is poking with a fork at a throw pillow covered in tomato sauce.]&lt;br /&gt;
::''Poke poke''&lt;br /&gt;
&lt;br /&gt;
:Ravioli, rest your head on: [green]&lt;br /&gt;
::[Cueball is looking at his phone and is lying on a couch. His head is resting on a throw pillow.]&lt;br /&gt;
&lt;br /&gt;
:Throw pillow, puncture and slurp: [red]&lt;br /&gt;
::[Cueball is sucking on a straw that is inserted in a pillow.]&lt;br /&gt;
::Cueball: Aw man, this one is empty.&lt;br /&gt;
&lt;br /&gt;
:Throw pillow, install in your phone: [red]&lt;br /&gt;
::[A phone is shown on a throw pillow that has the words “Home Sweet Home” partially obscured.]&lt;br /&gt;
&lt;br /&gt;
:Capri Sun, eat with a fork: [red]&lt;br /&gt;
::[Cueball sits on a chair in front of a table with a jar of sauce on it. He has stabbed a Capri Sun on a plate and is now splattered with juice.]&lt;br /&gt;
&lt;br /&gt;
:Capri Sun, rest your head on: [yellow]&lt;br /&gt;
::[Cueball is looking at his phone and is lying on a couch. His head is resting on a Capri Sun.]&lt;br /&gt;
::Cueball: Honestly kind of comfortable.&lt;br /&gt;
&lt;br /&gt;
:Capri Sun, puncture and slurp: [green]&lt;br /&gt;
::[Cueball is drinking from a Capri Sun through a straw.]&lt;br /&gt;
::''Sluuurp''&lt;br /&gt;
&lt;br /&gt;
:Capri Sun, Install in your phone: [red]&lt;br /&gt;
::[A phone is shown to be squishing a Capri Sun. Juice is trickling out.]&lt;br /&gt;
&lt;br /&gt;
:Bulging lithium battery, eat with a fork: [red]&lt;br /&gt;
::[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
&lt;br /&gt;
:Bulging lithium battery, rest your head on: [red]&lt;br /&gt;
::[Cueball is looking at his phone and lying on his couch. His head is resting on a smoldering battery.]&lt;br /&gt;
::Cueball: This fire hazard is uncomfortable&lt;br /&gt;
&lt;br /&gt;
:Bulging lithium battery, puncture and slurp: [red]&lt;br /&gt;
::[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
&lt;br /&gt;
:Bulging lithium battery, install in your phone: [green]&lt;br /&gt;
::[A phone with a bulging back, presumably from the bulging lithium battery. The phone’s screen is cracked in the center.]&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352884</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352884"/>
				<updated>2024-10-14T22:36:57Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{{w|Ravioli}} are a kind of stuffed pasta comprising a filling enveloped in thin pasta dough, commonly square shaped, and serving as the object of this comic's confusion matrix. This comic compares 4 'ravioli-shaped' objects (square shaped objects with internal filling) with common actions associated with them.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|Ravioli pasta would indeed be suitable to be eaten with a fork, as shown.&lt;br /&gt;
|Ravioli pasta is not structurally strong enough to support the weight of a human head while reclining and would break and spill its filling over your head and the object one is resting on.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|If the ravioli filling is thin enough, one could slurp it out with a straw.&lt;br /&gt;
|Phones are not meant to run on raviolis{{citation needed}}. Stuffing a phone with a ravioli would cause it to break as shown, spilling the filling through the phone, which is a terrible idea.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw Pillow}}&lt;br /&gt;
|Throw pillows are made of cloth and are inedible, whether one uses a fork or not.&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|A throw pillow is meant to be used as head support while reclining on furniture.&lt;br /&gt;
|Throw pillows do not have liquids inside them. Hence, Cueball finds that they're empty to his dismay.&lt;br /&gt;
|Throw pillows are significantly bigger than phones and as such can't fit inside them, nor power them.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|Eating a Capri Sun with a fork would most likely simply pierce the pouch and spill Capri Sun all over Cueball.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A Capri Sun would serve as a waterbed of sorts, and wouldn't be unduly uncomfortable in a pinch. Its still likely that the pouch could rupture however.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|Capri Suns are meant to be drunk like this, and are enjoyed by many.&lt;br /&gt;
|The Capri Sun shown is surrounded by spilled Capri Sun, implying that the installation punctured the pouch. Needless to say, this would be a terrible item to install in place of a phone battery.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|Bulging Lithium batteries are explosive hazards and are not meant to be punctured lest they explode.&lt;br /&gt;
|A lithium battery is a small, hard object, and a bulging one is no exception. It would also be a constant fire hazard, which would not be conducive to relaxation.&lt;br /&gt;
|Similarly to the 'eat with a fork' example, puncturing a bulging lithium battery is a bad idea.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|A bulging lithium battery could be installed in a phone, if one is willing to break the phone a bit (the screen in the comic) to accommodate the bulging of the battery. Also a terrible idea, as operating the lithium battery in this condition may result in the battery catching fire or worse. More commonly, bulging batteries form inside the phone itself, causing it to bulge outwards.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials. A ravioli that touched all four quadrants would be a health hazard due to exposure, fire hazard, chemically unstable, and have some other miscellaneous hazard(s).&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[A 5x5 grid of squares. The columns are labeled: Eat with a fork, rest your head on, puncture and slurp, install in your phone. The rows are: Ravioli, throw pillow, Capri Sun, bulging lithium battery. Each row has an image of each respective item above the title.]&lt;br /&gt;
Ravioli, eat with a fork: [green]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is eating from a plate from ravioli.]&lt;br /&gt;
Cueball: ''Nom Nom Nom''&lt;br /&gt;
Ravioli, Rest your head on: [red]&lt;br /&gt;
[Cueball is lying down on a couch with ravioli smooshed on his head and the couch. Ravioli bits can be seen on the ground]&lt;br /&gt;
Eww.&lt;br /&gt;
Ravioli, puncture and slurp: [yellow]&lt;br /&gt;
[Cueball is slurping from a ravioli through a straw. In front of him is table with two plates, presumably with ravioli on them.]&lt;br /&gt;
''Slurp''&lt;br /&gt;
Ravioli, Install in your phone: [red]&lt;br /&gt;
[A phone is shown with bits of ravioli sticking out and tomato sauce is dripping out.]&lt;br /&gt;
Throw pillow, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is poking with a fork at a throw pillow covered in tomato sauce.]&lt;br /&gt;
''Poke poke''&lt;br /&gt;
Ravioli, rest your head on: [green]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a throw pillow.]&lt;br /&gt;
Throw pillow, puncture and slurp: [red]&lt;br /&gt;
[Cueball is sucking on a straw that is inserted in a pillow.]&lt;br /&gt;
Aw man, this one is empty.&lt;br /&gt;
Throw pillow, install in your phone: [red]&lt;br /&gt;
[A phone is shown on a throw pillow that has the words “Home Sweet Home” partially obscured.]&lt;br /&gt;
Capri Sun, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He has stabbed a Capri Sun on a plate and is now splattered with juice.]&lt;br /&gt;
Capri Sun, rest your head on: [yellow]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a Capri Sun.]&lt;br /&gt;
Honestly kind of comfortable.&lt;br /&gt;
Capri Sun, puncture and slurp: [green]&lt;br /&gt;
[Cueball is drinking from a Capri Sun through a straw.]&lt;br /&gt;
''Sluuurp''&lt;br /&gt;
Capri Sun, Install in your phone: [red]&lt;br /&gt;
[A phone is shown to be squishing a Capri Sun. Juice is trickling out.]&lt;br /&gt;
Bulging lithium battery, eat with a fork: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, rest your head on: [red]&lt;br /&gt;
[Cueball is looking at his phone and lying on his couch. His head is resting on a smoldering battery.]&lt;br /&gt;
This fire hazard is uncomfortable&lt;br /&gt;
Bulging lithium battery, puncture and slurp: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, install in your phone: [green]&lt;br /&gt;
[A phone with a bulging back, presumably from the bulging lithium battery. The phone’s screen is cracked in the center.]&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352882</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352882"/>
				<updated>2024-10-14T22:36:24Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{{w|Ravioli}} are a kind of stuffed pasta comprising a filling enveloped in thin pasta dough, commonly square shaped, and serving as the object of this comic's confusion matrix. This comic compares 4 'ravioli-shaped' objects (square shaped objects with internal filling) with common actions associated with them.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|Ravioli pasta would indeed be suitable to be eaten with a fork, as shown.&lt;br /&gt;
|Ravioli pasta is not structurally strong enough to support the weight of a human head while reclining and would break and spill its filling over your head and the object one is resting on.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|If the ravioli filling is thin enough, one could slurp it out with a straw.&lt;br /&gt;
|Phones are not meant to run on raviolis{{citation needed}}. Stuffing a phone with a ravioli would cause it to break as shown, spilling the filling through the phone, which is a terrible idea.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw Pillow}}&lt;br /&gt;
|Throw pillows are made of cloth and are inedible, whether one uses a fork or not.&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|A throw pillow is meant to be used as head support while reclining on furniture.&lt;br /&gt;
|Throw pillows do not have liquids inside them. Hence, Cueball finds that they're empty to his dismay.&lt;br /&gt;
|Throw pillows are significantly bigger than phones and as such can't fit inside them, nor power them.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|Eating a Capri Sun with a fork would most likely simply pierce the pouch and spill Capri Sun all over Cueball.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A Capri Sun would serve as a waterbed of sorts, and wouldn't be unduly uncomfortable in a pinch. Its still likely that the pouch could rupture however.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|Capri Suns are meant to be drunk like this, and is enjoyed by many.&lt;br /&gt;
|The Capri Sun shown is surrounded by spilled Capri Sun, implying that the installation punctured the pouch. Needless to say, this would be a terrible item to install in place of a phone battery.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|Bulging Lithium batteries are explosive hazards and are not meant to be punctured lest they explode.&lt;br /&gt;
|A lithium battery is a small, hard object, and a bulging one is no exception. It would also be a constant fire hazard, which would not be conducive to relaxation.&lt;br /&gt;
|Similarly to the 'eat with a fork' example, puncturing a bulging lithium battery is a bad idea.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|A bulging lithium battery could be installed in a phone, if one is willing to break the phone a bit (the screen in the comic) to accommodate the bulging of the battery. Also a terrible idea, as operating the lithium battery in this condition may result in the battery catching fire or worse. More commonly, bulging batteries form inside the phone itself, causing it to bulge outwards.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials. A ravioli that touched all four quadrants would be a health hazard due to exposure, fire hazard, chemically unstable, and have some other miscellaneous hazard(s).&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[A 5x5 grid of squares. The columns are labeled: Eat with a fork, rest your head on, puncture and slurp, install in your phone. The rows are: Ravioli, throw pillow, Capri Sun, bulging lithium battery. Each row has an image of each respective item above the title.]&lt;br /&gt;
Ravioli, eat with a fork: [green]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is eating from a plate from ravioli.]&lt;br /&gt;
Cueball: ''Nom Nom Nom''&lt;br /&gt;
Ravioli, Rest your head on: [red]&lt;br /&gt;
[Cueball is lying down on a couch with ravioli smooshed on his head and the couch. Ravioli bits can be seen on the ground]&lt;br /&gt;
Eww.&lt;br /&gt;
Ravioli, puncture and slurp: [yellow]&lt;br /&gt;
[Cueball is slurping from a ravioli through a straw. In front of him is table with two plates, presumably with ravioli on them.]&lt;br /&gt;
''Slurp''&lt;br /&gt;
Ravioli, Install in your phone: [red]&lt;br /&gt;
[A phone is shown with bits of ravioli sticking out and tomato sauce is dripping out.]&lt;br /&gt;
Throw pillow, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is poking with a fork at a throw pillow covered in tomato sauce.]&lt;br /&gt;
''Poke poke''&lt;br /&gt;
Ravioli, rest your head on: [green]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a throw pillow.]&lt;br /&gt;
Throw pillow, puncture and slurp: [red]&lt;br /&gt;
[Cueball is sucking on a straw that is inserted in a pillow.]&lt;br /&gt;
Aw man, this one is empty.&lt;br /&gt;
Throw pillow, install in your phone: [red]&lt;br /&gt;
[A phone is shown on a throw pillow that has the words “Home Sweet Home” partially obscured.]&lt;br /&gt;
Capri Sun, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He has stabbed a Capri Sun on a plate and is now splattered with juice.]&lt;br /&gt;
Capri Sun, rest your head on: [yellow]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a Capri Sun.]&lt;br /&gt;
Honestly kind of comfortable.&lt;br /&gt;
Capri Sun, puncture and slurp: [green]&lt;br /&gt;
[Cueball is drinking from a Capri Sun through a straw.]&lt;br /&gt;
''Sluuurp''&lt;br /&gt;
Capri Sun, Install in your phone: [red]&lt;br /&gt;
[A phone is shown to be squishing a Capri Sun. Juice is trickling out.]&lt;br /&gt;
Bulging lithium battery, eat with a fork: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, rest your head on: [red]&lt;br /&gt;
[Cueball is looking at his phone and lying on his couch. His head is resting on a smoldering battery.]&lt;br /&gt;
This fire hazard is uncomfortable&lt;br /&gt;
Bulging lithium battery, puncture and slurp: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, install in your phone: [green]&lt;br /&gt;
[A phone with a bulging back, presumably from the bulging lithium battery. The phone’s screen is cracked in the center.]&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352881</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352881"/>
				<updated>2024-10-14T22:36:10Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{{w|Ravioli}} are a kind of stuffed pasta comprising a filling enveloped in thin pasta dough, commonly square shaped, and serving as the object of this comic's confusion matrix. This comic compares 4 'ravioli-shaped' objects (square shaped objects with internal filling) with common actions associated with them.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|Ravioli pasta would indeed be suitable to be eaten with a fork, as shown.&lt;br /&gt;
|Ravioli pasta is not structurally strong enough to support the weight of a human head while reclining and would break and spill its filling over your head and the object one is resting on.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|If the ravioli filling is thin enough, one could slurp it out with a straw.&lt;br /&gt;
|Phones are not meant to run on raviolis{{citation needed}}. Stuffing a phone with a ravioli would cause it to break as shown, spilling the filling through the phone, which is a terrible idea.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw Pillow}}&lt;br /&gt;
|Throw pillows are made of cloth and are inedible, whether one uses a fork or not.&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|A throw pillow is meant to be used as head support while reclining on furniture.&lt;br /&gt;
|Throw pillows do not have liquids inside them. Hence, Cueball finds that they're empty to his dismay.&lt;br /&gt;
|Throw pillows are significantly bigger than phones and as such can fit inside them, nor power them.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|Eating a Capri Sun with a fork would most likely simply pierce the pouch and spill Capri Sun all over Cueball.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A Capri Sun would serve as a waterbed of sorts, and wouldn't be unduly uncomfortable in a pinch. Its still likely that the pouch could rupture however.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|Capri Suns are meant to be drunk like this, and is enjoyed by many.&lt;br /&gt;
|The Capri Sun shown is surrounded by spilled Capri Sun, implying that the installation punctured the pouch. Needless to say, this would be a terrible item to install in place of a phone battery.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|Bulging Lithium batteries are explosive hazards and are not meant to be punctured lest they explode.&lt;br /&gt;
|A lithium battery is a small, hard object, and a bulging one is no exception. It would also be a constant fire hazard, which would not be conducive to relaxation.&lt;br /&gt;
|Similarly to the 'eat with a fork' example, puncturing a bulging lithium battery is a bad idea.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|A bulging lithium battery could be installed in a phone, if one is willing to break the phone a bit (the screen in the comic) to accommodate the bulging of the battery. Also a terrible idea, as operating the lithium battery in this condition may result in the battery catching fire or worse. More commonly, bulging batteries form inside the phone itself, causing it to bulge outwards.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials. A ravioli that touched all four quadrants would be a health hazard due to exposure, fire hazard, chemically unstable, and have some other miscellaneous hazard(s).&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[A 5x5 grid of squares. The columns are labeled: Eat with a fork, rest your head on, puncture and slurp, install in your phone. The rows are: Ravioli, throw pillow, Capri Sun, bulging lithium battery. Each row has an image of each respective item above the title.]&lt;br /&gt;
Ravioli, eat with a fork: [green]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is eating from a plate from ravioli.]&lt;br /&gt;
Cueball: ''Nom Nom Nom''&lt;br /&gt;
Ravioli, Rest your head on: [red]&lt;br /&gt;
[Cueball is lying down on a couch with ravioli smooshed on his head and the couch. Ravioli bits can be seen on the ground]&lt;br /&gt;
Eww.&lt;br /&gt;
Ravioli, puncture and slurp: [yellow]&lt;br /&gt;
[Cueball is slurping from a ravioli through a straw. In front of him is table with two plates, presumably with ravioli on them.]&lt;br /&gt;
''Slurp''&lt;br /&gt;
Ravioli, Install in your phone: [red]&lt;br /&gt;
[A phone is shown with bits of ravioli sticking out and tomato sauce is dripping out.]&lt;br /&gt;
Throw pillow, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is poking with a fork at a throw pillow covered in tomato sauce.]&lt;br /&gt;
''Poke poke''&lt;br /&gt;
Ravioli, rest your head on: [green]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a throw pillow.]&lt;br /&gt;
Throw pillow, puncture and slurp: [red]&lt;br /&gt;
[Cueball is sucking on a straw that is inserted in a pillow.]&lt;br /&gt;
Aw man, this one is empty.&lt;br /&gt;
Throw pillow, install in your phone: [red]&lt;br /&gt;
[A phone is shown on a throw pillow that has the words “Home Sweet Home” partially obscured.]&lt;br /&gt;
Capri Sun, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He has stabbed a Capri Sun on a plate and is now splattered with juice.]&lt;br /&gt;
Capri Sun, rest your head on: [yellow]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a Capri Sun.]&lt;br /&gt;
Honestly kind of comfortable.&lt;br /&gt;
Capri Sun, puncture and slurp: [green]&lt;br /&gt;
[Cueball is drinking from a Capri Sun through a straw.]&lt;br /&gt;
''Sluuurp''&lt;br /&gt;
Capri Sun, Install in your phone: [red]&lt;br /&gt;
[A phone is shown to be squishing a Capri Sun. Juice is trickling out.]&lt;br /&gt;
Bulging lithium battery, eat with a fork: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, rest your head on: [red]&lt;br /&gt;
[Cueball is looking at his phone and lying on his couch. His head is resting on a smoldering battery.]&lt;br /&gt;
This fire hazard is uncomfortable&lt;br /&gt;
Bulging lithium battery, puncture and slurp: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, install in your phone: [green]&lt;br /&gt;
[A phone with a bulging back, presumably from the bulging lithium battery. The phone’s screen is cracked in the center.]&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352880</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352880"/>
				<updated>2024-10-14T22:35:17Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{{w|Ravioli}} are a kind of stuffed pasta comprising a filling enveloped in thin pasta dough, commonly square shaped, and serving as the object of this comic's confusion matrix. This comic compares 4 'ravioli-shaped' objects (square shaped objects with internal filling) with common actions associated with them.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|Ravioli pasta would indeed be suitable to be eaten with a fork, as shown.&lt;br /&gt;
|Ravioli pasta is not structurally strong enough to support the weight of a human head while reclining and would break and spill its filling over your head and the object one is resting on.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|If the ravioli filling is thin enough, one could slurp it out with a straw.&lt;br /&gt;
|Phones are not meant to run on raviolis{{citation needed}}.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw Pillow}}&lt;br /&gt;
|Throw pillows are made of cloth and are inedible, whether one uses a fork or not.&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|A throw pillow is meant to be used as head support while reclining on furniture.&lt;br /&gt;
|Throw pillows do not have liquids inside them. Hence, Cueball finds that they're empty to his dismay.&lt;br /&gt;
|Throw pillows are significantly bigger than phones and as such can fit inside them, nor power them.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|Eating a Capri Sun with a fork would most likely simply pierce the pouch and spill Capri Sun all over Cueball.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A Capri Sun would serve as a waterbed of sorts, and wouldn't be unduly uncomfortable in a pinch. Its still likely that the pouch could rupture however.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|Capri Suns are meant to be drunk like this, and is enjoyed by many.&lt;br /&gt;
|The Capri Sun shown is surrounded by spilled Capri Sun, implying that the installation punctured the pouch. Needless to say, this would be a terrible item to install in place of a phone battery.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|Bulging Lithium batteries are explosive hazards and are not meant to be punctured lest they explode.&lt;br /&gt;
|A lithium battery is a small, hard object, and a bulging one is no exception. It would also be a constant fire hazard, which would not be conducive to relaxation.&lt;br /&gt;
|Similarly to the 'eat with a fork' example, puncturing a bulging lithium battery is a bad idea.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|A bulging lithium battery could be installed in a phone, if one is willing to break the phone a bit (the screen in the comic) to accommodate the bulging of the battery. Also a terrible idea, as operating the lithium battery in this condition may result in the battery catching fire or worse. More commonly, bulging batteries form inside the phone itself, causing it to bulge outwards.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials. A ravioli that touched all four quadrants would be a health hazard due to exposure, fire hazard, chemically unstable, and have some other miscellaneous hazard(s).&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[A 5x5 grid of squares. The columns are labeled: Eat with a fork, rest your head on, puncture and slurp, install in your phone. The rows are: Ravioli, throw pillow, Capri Sun, bulging lithium battery. Each row has an image of each respective item above the title.]&lt;br /&gt;
Ravioli, eat with a fork: [green]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is eating from a plate from ravioli.]&lt;br /&gt;
Cueball: ''Nom Nom Nom''&lt;br /&gt;
Ravioli, Rest your head on: [red]&lt;br /&gt;
[Cueball is lying down on a couch with ravioli smooshed on his head and the couch. Ravioli bits can be seen on the ground]&lt;br /&gt;
Eww.&lt;br /&gt;
Ravioli, puncture and slurp: [yellow]&lt;br /&gt;
[Cueball is slurping from a ravioli through a straw. In front of him is table with two plates, presumably with ravioli on them.]&lt;br /&gt;
''Slurp''&lt;br /&gt;
Ravioli, Install in your phone: [red]&lt;br /&gt;
[A phone is shown with bits of ravioli sticking out and tomato sauce is dripping out.]&lt;br /&gt;
Throw pillow, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is poking with a fork at a throw pillow covered in tomato sauce.]&lt;br /&gt;
''Poke poke''&lt;br /&gt;
Ravioli, rest your head on: [green]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a throw pillow.]&lt;br /&gt;
Throw pillow, puncture and slurp: [red]&lt;br /&gt;
[Cueball is sucking on a straw that is inserted in a pillow.]&lt;br /&gt;
Aw man, this one is empty.&lt;br /&gt;
Throw pillow, install in your phone: [red]&lt;br /&gt;
[A phone is shown on a throw pillow that has the words “Home Sweet Home” partially obscured.]&lt;br /&gt;
Capri Sun, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He has stabbed a Capri Sun on a plate and is now splattered with juice.]&lt;br /&gt;
Capri Sun, rest your head on: [yellow]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a Capri Sun.]&lt;br /&gt;
Honestly kind of comfortable.&lt;br /&gt;
Capri Sun, puncture and slurp: [green]&lt;br /&gt;
[Cueball is drinking from a Capri Sun through a straw.]&lt;br /&gt;
''Sluuurp''&lt;br /&gt;
Capri Sun, Install in your phone: [red]&lt;br /&gt;
[A phone is shown to be squishing a Capri Sun. Juice is trickling out.]&lt;br /&gt;
Bulging lithium battery, eat with a fork: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, rest your head on: [red]&lt;br /&gt;
[Cueball is looking at his phone and lying on his couch. His head is resting on a smoldering battery.]&lt;br /&gt;
This fire hazard is uncomfortable&lt;br /&gt;
Bulging lithium battery, puncture and slurp: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, install in your phone: [green]&lt;br /&gt;
[A phone with a bulging back, presumably from the bulging lithium battery. The phone’s screen is cracked in the center.]&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352879</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352879"/>
				<updated>2024-10-14T22:34:49Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{{w|Ravioli}} are a kind of stuffed pasta comprising a filling enveloped in thin pasta dough, commonly square shaped, and serving as the object of this comic's confusion matrix. This comic compares 4 'ravioli-shaped' objects (square shaped objects with internal filling) with common actions associated with them.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|Ravioli pasta would indeed be suitable to be eaten with a fork, as shown.&lt;br /&gt;
|Ravioli pasta is not structurally strong enough to support the weight of a human head while reclining and would break and spill its filling over your head and the object one is resting on.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|If the ravioli filling is thin enough, one could slurp it out with a straw.&lt;br /&gt;
|Phones are not meant to run on raviolis{{citation needed}}.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw Pillow}}&lt;br /&gt;
|Throw pillows are made of cloth and are inedible, whether one uses a fork or not.&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|A throw pillow is meant to be used as head support while reclining on furniture.&lt;br /&gt;
|Throw pillows do not have liquids inside them. Hence, Cueball finds that they're empty to his dismay.&lt;br /&gt;
|Throw pillows are significantly bigger than phones and as such can fit inside them, nor power them.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|Eating a Capri Sun with a fork would most likely simply pierce the pouch and spill Capri Sun all over Cueball.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A Capri Sun would serve as a waterbed of sorts, and wouldn't be unduly uncomfortable in a pinch. Its still likely that the pouch could rupture however.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|Capri Suns are meant to be drunk like this, and is enjoyed by many.&lt;br /&gt;
|The Capri Sun shown is surrounded by spilled Capri Sun, implying that the installation punctured the pouch. Needless to say, this would be a terrible item to install in place of a phone battery.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|Bulging Lithium batteries are explosive hazards and are not meant to be punctured lest they explode.&lt;br /&gt;
|A lithium battery is a small, hard object, and a bulging one is no exception. It would also be a constant fire hazard, which would not be conducive to relaxation.&lt;br /&gt;
|Similarly to the 'eat with a fork' example, puncturing a bulging lithium battery is a bad idea.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A bulging lithium battery could be installed in a phone, if one is willing to break the phone a bit (the screen in the comic) to accommodate the bulging of the battery. Also a terrible idea, as operating the lithium battery in this condition may result in the battery catching fire or worse. More commonly, bulging batteries form inside the phone itself, causing it to bulge outwards.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials. A ravioli that touched all four quadrants would be a health hazard due to exposure, fire hazard, chemically unstable, and have some other miscellaneous hazard(s).&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[A 5x5 grid of squares. The columns are labeled: Eat with a fork, rest your head on, puncture and slurp, install in your phone. The rows are: Ravioli, throw pillow, Capri Sun, bulging lithium battery. Each row has an image of each respective item above the title.]&lt;br /&gt;
Ravioli, eat with a fork: [green]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is eating from a plate from ravioli.]&lt;br /&gt;
Cueball: ''Nom Nom Nom''&lt;br /&gt;
Ravioli, Rest your head on: [red]&lt;br /&gt;
[Cueball is lying down on a couch with ravioli smooshed on his head and the couch. Ravioli bits can be seen on the ground]&lt;br /&gt;
Eww.&lt;br /&gt;
Ravioli, puncture and slurp: [yellow]&lt;br /&gt;
[Cueball is slurping from a ravioli through a straw. In front of him is table with two plates, presumably with ravioli on them.]&lt;br /&gt;
''Slurp''&lt;br /&gt;
Ravioli, Install in your phone: [red]&lt;br /&gt;
[A phone is shown with bits of ravioli sticking out and tomato sauce is dripping out.]&lt;br /&gt;
Throw pillow, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is poking with a fork at a throw pillow covered in tomato sauce.]&lt;br /&gt;
''Poke poke''&lt;br /&gt;
Ravioli, rest your head on: [green]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a throw pillow.]&lt;br /&gt;
Throw pillow, puncture and slurp: [red]&lt;br /&gt;
[Cueball is sucking on a straw that is inserted in a pillow.]&lt;br /&gt;
Aw man, this one is empty.&lt;br /&gt;
Throw pillow, install in your phone: [red]&lt;br /&gt;
[A phone is shown on a throw pillow that has the words “Home Sweet Home” partially obscured.]&lt;br /&gt;
Capri Sun, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He has stabbed a Capri Sun on a plate and is now splattered with juice.]&lt;br /&gt;
Capri Sun, rest your head on: [yellow]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a Capri Sun.]&lt;br /&gt;
Honestly kind of comfortable.&lt;br /&gt;
Capri Sun, puncture and slurp: [green]&lt;br /&gt;
[Cueball is drinking from a Capri Sun through a straw.]&lt;br /&gt;
''Sluuurp''&lt;br /&gt;
Capri Sun, Install in your phone: [red]&lt;br /&gt;
[A phone is shown to be squishing a Capri Sun. Juice is trickling out.]&lt;br /&gt;
Bulging lithium battery, eat with a fork: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, rest your head on: [red]&lt;br /&gt;
[Cueball is looking at his phone and lying on his couch. His head is resting on a smoldering battery.]&lt;br /&gt;
This fire hazard is uncomfortable&lt;br /&gt;
Bulging lithium battery, puncture and slurp: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, install in your phone: [green]&lt;br /&gt;
[A phone with a bulging back, presumably from the bulging lithium battery. The phone’s screen is cracked in the center.]&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352878</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352878"/>
				<updated>2024-10-14T22:34:35Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */ Rough draft of explanation table&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{{w|Ravioli}} are a kind of stuffed pasta comprising a filling enveloped in thin pasta dough, commonly square shaped, and serving as the object of this comic's confusion matrix. This comic compares 4 'ravioli-shaped' objects (square shaped objects with internal filling) with common actions associated with them.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|Ravioli pasta would indeed be suitable to be eaten with a fork, as shown.&lt;br /&gt;
|Ravioli pasta is not structurally strong enough to support the weight of a human head while reclining and would break and spill its filling over your head and the object one is resting on.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|If the ravioli filling is thin enough, one could slurp it out with a straw.&lt;br /&gt;
|Phones are not meant to run on raviolis{{citation needed}}.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw Pillow}}&lt;br /&gt;
|Throw pillows are made of cloth and are inedible, whether one uses a fork or not.&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|A throw pillow is meant to be used as head support while reclining on furniture.&lt;br /&gt;
|Throw pillows do not have liquids inside them. Hence, Cueball finds that they're empty to his dismay.&lt;br /&gt;
|Throw pillows are significantly bigger than phones and as such can fit inside them, nor power them.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|Eating a Capri Sun with a fork would most likely simply pierce the pouch and spill Capri Sun all over Cueball.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A Capri Sun would serve as a waterbed of sorts, and wouldn't be unduly uncomfortable in a pinch. Its still likely that the pouch could rupture however.&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|Capri Suns are meant to be drunk like this, and is enjoyed by many.&lt;br /&gt;
|The Capri Sun shown is surrounded by spilled Capri Sun, implying that the installation punctured the pouch. Needless to say, this would be a terrible item to install in place of a phone battery.&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|Bulging Lithium batteries are explosive hazards and are not meant to be punctured lest they explode.&lt;br /&gt;
|A lithium battery is a small, hard object, and a bulging one is no exception. It would also be a constant fire hazard, which would not be conducive to relaxation.&lt;br /&gt;
|Similarly to the 'eat with a fork' example, puncturing a bulging lithium battery is a bad idea.&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|A bulging lithium battery could be installed in a phone, if one is willing to break the phone a bit (the screen in the comic) to accommodate the bulging of the battery. Also a terrible idea, as operating the lithium battery in this condition may result in the battery catching fire or worse. More commonly, bulging batteries form inside the phone itself, causing it to bulge outwards.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials. A ravioli that touched all four quadrants would be a health hazard due to exposure, fire hazard, chemically unstable, and have some other miscellaneous hazard(s).&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[A 5x5 grid of squares. The columns are labeled: Eat with a fork, rest your head on, puncture and slurp, install in your phone. The rows are: Ravioli, throw pillow, Capri Sun, bulging lithium battery. Each row has an image of each respective item above the title.]&lt;br /&gt;
Ravioli, eat with a fork: [green]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is eating from a plate from ravioli.]&lt;br /&gt;
Cueball: ''Nom Nom Nom''&lt;br /&gt;
Ravioli, Rest your head on: [red]&lt;br /&gt;
[Cueball is lying down on a couch with ravioli smooshed on his head and the couch. Ravioli bits can be seen on the ground]&lt;br /&gt;
Eww.&lt;br /&gt;
Ravioli, puncture and slurp: [yellow]&lt;br /&gt;
[Cueball is slurping from a ravioli through a straw. In front of him is table with two plates, presumably with ravioli on them.]&lt;br /&gt;
''Slurp''&lt;br /&gt;
Ravioli, Install in your phone: [red]&lt;br /&gt;
[A phone is shown with bits of ravioli sticking out and tomato sauce is dripping out.]&lt;br /&gt;
Throw pillow, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He is poking with a fork at a throw pillow covered in tomato sauce.]&lt;br /&gt;
''Poke poke''&lt;br /&gt;
Ravioli, rest your head on: [green]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a throw pillow.]&lt;br /&gt;
Throw pillow, puncture and slurp: [red]&lt;br /&gt;
[Cueball is sucking on a straw that is inserted in a pillow.]&lt;br /&gt;
Aw man, this one is empty.&lt;br /&gt;
Throw pillow, install in your phone: [red]&lt;br /&gt;
[A phone is shown on a throw pillow that has the words “Home Sweet Home” partially obscured.]&lt;br /&gt;
Capri Sun, eat with a fork: [red]&lt;br /&gt;
[Cueball sits on a chair in front of a table with a jar of sauce on it. He has stabbed a Capri Sun on a plate and is now splattered with juice.]&lt;br /&gt;
Capri Sun, rest your head on: [yellow]&lt;br /&gt;
[Cueball is looking at his phone and is lying on a couch. His head is resting on a Capri Sun.]&lt;br /&gt;
Honestly kind of comfortable.&lt;br /&gt;
Capri Sun, puncture and slurp: [green]&lt;br /&gt;
[Cueball is drinking from a Capri Sun through a straw.]&lt;br /&gt;
''Sluuurp''&lt;br /&gt;
Capri Sun, Install in your phone: [red]&lt;br /&gt;
[A phone is shown to be squishing a Capri Sun. Juice is trickling out.]&lt;br /&gt;
Bulging lithium battery, eat with a fork: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, rest your head on: [red]&lt;br /&gt;
[Cueball is looking at his phone and lying on his couch. His head is resting on a smoldering battery.]&lt;br /&gt;
This fire hazard is uncomfortable&lt;br /&gt;
Bulging lithium battery, puncture and slurp: [red]&lt;br /&gt;
[An explosion bordered by 4 skull and crossbones.]&lt;br /&gt;
Bulging lithium battery, install in your phone: [green]&lt;br /&gt;
[A phone with a bulging back, presumably from the bulging lithium battery. The phone’s screen is cracked in the center.]&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352872</id>
		<title>2998: Ravioli-Shaped Objects</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2998:_Ravioli-Shaped_Objects&amp;diff=352872"/>
				<updated>2024-10-14T22:18:22Z</updated>
		
		<summary type="html">&lt;p&gt;Xurkitree10: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2998&lt;br /&gt;
| date      = October 14, 2024&lt;br /&gt;
| title     = Ravioli-Shaped Objects&lt;br /&gt;
| image     = ravioli_shaped_objects_2x.png&lt;br /&gt;
| imagesize = 608x569px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's a real accomplishment to mess up a ravioli recipe badly enough that the resulting incident touches all four quadrants of the NFPA hazard diamond.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BULGING LITHIUM BATTERY THROW PILLOW - I've added the table template, fill it out accordingly. Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot; | style=&amp;quot;background:#E6C3C3;&amp;quot;&lt;br /&gt;
! Ravioli-Shaped Objects&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Eat with a fork&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Rest your head on&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Puncture and slurp&lt;br /&gt;
! scope=&amp;quot;col&amp;quot;| Install in your phone&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Ravioli}}&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|&lt;br /&gt;
|A&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|&lt;br /&gt;
|B&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Throw Pillow}}&lt;br /&gt;
|A&lt;br /&gt;
| style=&amp;quot;background:#C5E6C3;&amp;quot;|&lt;br /&gt;
|B&lt;br /&gt;
|C&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| {{w|Capri Sun}}&lt;br /&gt;
|A&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|&lt;br /&gt;
|style=&amp;quot;background:#C5E6C3;&amp;quot;|&lt;br /&gt;
|B&lt;br /&gt;
|-&lt;br /&gt;
! scope=&amp;quot;row&amp;quot;| Bulging {{w|Lithium Battery}}&lt;br /&gt;
|A&lt;br /&gt;
|B&lt;br /&gt;
|C&lt;br /&gt;
|style=&amp;quot;background:#FBF8CE;&amp;quot;|&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
The title text refers to the {{w|NFPA 704}} diagram for hazardous materials. A ravioli that touched all four quadrants would be a health hazard due to exposure, fire hazard, chemically unstable, and have some other miscellaneous hazard(s).&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Confusion matrices]]&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Xurkitree10</name></author>	</entry>

	</feed>