<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
		<id>https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=172.70.90.99</id>
		<title>explain xkcd - User contributions [en]</title>
		<link rel="self" type="application/atom+xml" href="https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=172.70.90.99"/>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php/Special:Contributions/172.70.90.99"/>
		<updated>2026-04-15T03:14:10Z</updated>
		<subtitle>User contributions</subtitle>
		<generator>MediaWiki 1.30.0</generator>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2960:_Organ_Meanings&amp;diff=346582</id>
		<title>2960: Organ Meanings</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2960:_Organ_Meanings&amp;diff=346582"/>
				<updated>2024-07-18T08:19:55Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2960&lt;br /&gt;
| date      = July 17, 2024&lt;br /&gt;
| title     = Organ Meanings&lt;br /&gt;
| image     = organ_meanings_2x.png&lt;br /&gt;
| imagesize = 407x346px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = IMO the thymus is one of the coolest organs and we should really use it in metaphors more.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BOT'S PINEAL GLAND - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
This is a graph by [[Randall]] ranking how well he understands the function of certain human organs, compared to how much he understands metaphors using them. For example, a person who has a &amp;quot;silver tongue&amp;quot; doesn't have a literal silver tongue, but is very persuasive when speaking, while to &amp;quot;bite one's tongue&amp;quot; means to stop yourself from saying something you would really like to say.&lt;br /&gt;
&lt;br /&gt;
One might expect understanding an organ's role and it's use in metaphor to be strongly correlated, since the metaphors work by drawing a parallel to biological function. However, since our understanding of biological functions has evolved dramatically over time, and metaphorical language does not always keep up, the correspondence is often much looser.&lt;br /&gt;
&lt;br /&gt;
The {{w|pineal gland}}, located in the center of the brain, has been described as the “Seat of the Soul” by the dualist {{w|René Descartes}} in the 17th Century. If it was so, the metaphor based on it would be pretty explicit. It was only in the mid-20th Century that its real neuroendocrine (hormone-producing) biological role was grasped. Thus, the real meaning of the metaphor &amp;quot;the pineal gland of something&amp;quot; is uncertain, as is its actual function for the layman.&lt;br /&gt;
&lt;br /&gt;
The {{w|Thymus}}, highlighted in the title text, plays an important role in the immune system. It is not commonly used in metaphors{{cn}}, but is perhaps ripe for use in ones describing such things as resilience, indomitability, and adaptability to changing circumstance, were more people to know what it was.&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>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2960:_Organ_Meanings&amp;diff=346581</id>
		<title>2960: Organ Meanings</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2960:_Organ_Meanings&amp;diff=346581"/>
				<updated>2024-07-18T08:18:19Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2960&lt;br /&gt;
| date      = July 17, 2024&lt;br /&gt;
| title     = Organ Meanings&lt;br /&gt;
| image     = organ_meanings_2x.png&lt;br /&gt;
| imagesize = 407x346px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = IMO the thymus is one of the coolest organs and we should really use it in metaphors more.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BOT'S PINEAL GLAND - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
This is a graph by [[Randall]] ranking how well he understands the function of certain human organs, compared to how much he understands metaphors using them. For example, a person who has a &amp;quot;silver tongue&amp;quot; doesn't have a literal silver tongue, but is very persuasive when speaking, while to &amp;quot;bite one's tongue&amp;quot; means to stop yourself from saying something you would really like to say.&lt;br /&gt;
&lt;br /&gt;
One might expect understanding an organ's role and it's use in metaphor to be strongly correlated, since the metaphors work by drawing a parallel to biological function. However, since our understanding of biological functions has evolved dramatically over time, and metaphorical language does not always keep up, the correspondence is often much looser.&lt;br /&gt;
&lt;br /&gt;
The {{w|pineal gland}}, located in the center of the brain, has been described as the “Seat of the Soul” by the dualist René Descartes in the 17th century. If it was so, the metaphor based on it would be pretty explicit. Its only in the mid-20th century that its neuroendocrine (hormone producing) real biological role was grasped. Thus, the real meaning of the metaphor &amp;quot;the pineal gland of something&amp;quot; is uncertain, so is its actual function for the layman.&lt;br /&gt;
&lt;br /&gt;
The {{w|Thymus}}, highlighted in the title text, plays an important role in the immune system. It is not commonly used in metaphors{{cn}}, but is perhaps ripe for use in ones describing such things as resilience, indomitability, and adaptability to changing circumstance, were more people to know what it was.&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>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:1754:_Tornado_Safety_Tips&amp;diff=346278</id>
		<title>Talk:1754: Tornado Safety Tips</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:1754:_Tornado_Safety_Tips&amp;diff=346278"/>
				<updated>2024-07-12T10:05:44Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: Undo revision 346270 by 172.68.23.199 (talk) Pretty sure personal attacks (let alone genocidal statements) are against community guidelines. No redeeming qualities to this(/these?) post/s&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~--&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Just to avoid edit wars and be clear with each other - Yeah. I don't want people reverting over and over without knowing our reasons. [[User:Jacky720|Jacky720]] ([[User talk:Jacky720|talk]]) 14:30, 2 November 2016 (UTC)&lt;br /&gt;
&lt;br /&gt;
Is the title-text a Ghostbusters reference? [[Special:Contributions/172.68.54.127|172.68.54.127]] 18:01, 2 November 2016 (UTC)&lt;br /&gt;
:I do not think so. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 21:03, 2 November 2016 (UTC)&lt;br /&gt;
&lt;br /&gt;
Anyone who can explain the PSA better. As a non native english speakers I have never heard of PSA before, and although I understand what it means with the current explanation it is not really something that pops up when googled. A nice link would be great. I have also found [https://s-media-cache-ak0.pinimg.com/736x/b3/ba/02/b3ba0231f99bf14622a347b65ad30ea7.jpg a picture with this very title] but it seems to only be on pinterest, so I'm not sure we could use it in this explanation... --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 19:06, 2 November 2016 (UTC)&lt;br /&gt;
:Does what I added help? It probably didn't aid things either that PSA, at least in 'Murica,  actually stands for &amp;quot;Public Service Announcement,&amp;quot; not the more specific &amp;quot;Public Safety Advisory,&amp;quot; and the only thing I was able to find when searching for the latter was information about government committees named that. [[Special:Contributions/172.68.65.127|172.68.65.127]] 01:59, 3 November 2016 (UTC)&lt;br /&gt;
::What is there now is great. I could not find that wiki page when I searched. Thanks. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:31, 3 November 2016 (UTC)&lt;br /&gt;
&lt;br /&gt;
I was just about to create a new category [[:Category:Tornadoes]], but when I posted the first link on the very first tornado comic, the link was already active. It turned out that [[User:Jacky720|Jacky720]] had just created it earlier today. Turns out there were already ten comics referencing tornadoes before this one. Now we just need to create a category for volcanoes as well, I think they are just as often referenced... ;-) --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 21:03, 2 November 2016 (UTC)&lt;br /&gt;
:How about categories for Weather and Geologic Activity? [[Special:Contributions/108.162.210.196|108.162.210.196]] 23:22, 2 November 2016 (UTC)&lt;br /&gt;
::That could also make sense. But that would not rule out the volcano or tornado category. They would be soub categories. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:31, 3 November 2016 (UTC)&lt;br /&gt;
&lt;br /&gt;
Should there be quotation marks around Tornadoes in the sentence &amp;quot;Tornadoes is a recurring subject on xkcd.&amp;quot;? I realize that the construction is being used as &amp;quot;(category) is a recurring subject&amp;quot; with &amp;quot;Tornadoes&amp;quot; being a single category, but I can't help but cringe a little when I read &amp;quot;Tornadoes is&amp;quot;; my instinctual grammar sense is in conflict with the fact that on analyzing it I know it is following the rules. [[Special:Contributions/108.162.238.48|108.162.238.48]] 12:00, 3 November 2016 (UTC)&lt;br /&gt;
:No I agree that is should have been are. My bad. Someone has already corrected it. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 13:46, 3 November 2016 (UTC)&lt;br /&gt;
&lt;br /&gt;
Can someone explain why Black Hat is on the poster? It's the only part that confuses me. {{unsigned ip|108.162.241.57}}&lt;br /&gt;
: [[Black Hat]] is well known for his controversial statements or actions in the XKCD universe. He is often the character that will ruin something just for the sake of it, even more so if it may have dire consequences for ''others''. Many safety posters feature a person or character giving the advice for more emotional impact and this seems exactly like the kind of confusing and potentially dangerous poster he would create and he would not be ashamed of being featured on it. [[User:Ralfoide|Ralfoide]] ([[User talk:Ralfoide|talk]]) 16:18, 3 November 2016 (UTC)&lt;br /&gt;
&lt;br /&gt;
The sentence &amp;quot;in 937: TornadoGuard. Sadly that seems to also have been made by Black Hat!&amp;quot; seems unsubstantiated. Nothing in 937 mentions Black Hat. [[User:Ralfoide|Ralfoide]] ([[User talk:Ralfoide|talk]]) 15:56, 3 November 2016 (UTC)&lt;/div&gt;</summary>
		<author><name>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2922:_Pub_Trivia&amp;diff=346214</id>
		<title>2922: Pub Trivia</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2922:_Pub_Trivia&amp;diff=346214"/>
				<updated>2024-07-11T12:27:23Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: /* Explanation */ add link&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2922&lt;br /&gt;
| date      = April 19, 2024&lt;br /&gt;
| title     = Pub Trivia&lt;br /&gt;
| image     = pub_trivia_2x.png&lt;br /&gt;
| imagesize = 422x666px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Bonus question: Where is London located? (a) The British Isles (b) Great Britain and Northern Ireland (c) The UK (d) Europe (or 'the EU') (e) Greater London&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
Many {{w|pub}}s have {{w|pub trivia|trivia nights}}, where patrons form teams and compete to answer questions about a range of topics. The typical goal for trivia games is that they be challenging, yet possible, and so questions with answers that are too difficult or too easy generally make for a poor game. In addition, it's usually preferable that questions are clearly worded with a single, objective answer, so as to avoid disputes about which answers are correct.&lt;br /&gt;
&lt;br /&gt;
Cueball has apparently been hired by one bar to infiltrate ''other'' bars' quiz nights and ask particularly bad questions. The implication is that this will make the games unpleasant, in the hopes that people will leave, and possibly go to the bar that hired Cueball. &lt;br /&gt;
&lt;br /&gt;
Cueball uses a variety of strategies to write bad questions, including questions that are trivial (where the answer is painfully obvious), unanswerable (either because there is no answer or because the answer is unknown), ambiguously worded or arguable. &lt;br /&gt;
&lt;br /&gt;
Many of his questions could be altered slightly to make them more reasonable for such a game, but that would defeat Cueball's purpose.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Question !! Problem with the Question !! Explanation !! More Reasonable Alternative(s)&lt;br /&gt;
|-&lt;br /&gt;
|1. Which member of {{w|BTS}} has a birthday this year?||Potentially confusing {{w|trick question}}.||All people have birthdays every year{{Citation needed}} (other than pedantic exceptions due to calendar issues or timezone alterations, or someone dying before their birthday, or being born on a leap day, none of which apply in this case). Therefore, answering with any of the seven members of BTS would be correct making the question equivalent to &amp;quot;Name any member of BTS&amp;quot; (a perfectly valid pub trivia question). The trick nature of this question may result in participant questions or confusion if not &amp;quot;par for the course&amp;quot;.||Name any member of BTS. Which member of BTS has a birthday today/this week/this month? Which member of BTS turns [a specific age] this year? Which members of BTS have a birthday later this year?&lt;br /&gt;
|-&lt;br /&gt;
|2. How many sides does a {{w|platonic solid}} have?||Multiple answers, ambiguous language||There are five {{w|Platonic solids}}, with 4, 6, 8, 12 or 20 faces (colloquially called sides) in {{w|Euclid|Euclidean}} {{w|Euclidean geometry|3-space}}. The solids have, respectively, 6, 12, 12, 30 and 30 edges (also occasionally called sides colloquially). A more devious quizmaster might actually include this as a trick question with the correct answer being 'zero', since strictly speaking solids do not have 'sides'. Or 'two' inside and outside.||How many Platonic solids are there? What is the highest number of faces on a Platonic solid? How many faces does a [specific Platonic solid] have? How many faces (or edges, or vertices) do ''all'' the Platonic solids have (i.e., added together)? What is the number of vertices, minus the number of edges, plus the number of faces equal to for a platonic solid (i.e., the {{w|Euler characteristic}})?&lt;br /&gt;
|-&lt;br /&gt;
|3. What is the smallest lake in the world?||Arguable, potentially unknowable||While the largest lakes are relatively straightforward to categorize, smaller bodies of water range in size down to individual puddles. There is no clear, definitional line at which a body goes from being a lake to a pond, for example. In addition, the size of small lakes will fluctuate due to variability in precipitation, and other weather effects, and some lakes only exist for brief periods (intermittent lakes). Hence, which small bodies of water are &amp;quot;lakes&amp;quot; and which is the smallest can't be clearly answered, without specifying a whole list of parameters and standards.&lt;br /&gt;
&lt;br /&gt;
This question is related to the Tom Scott video [https://www.youtube.com/watch?v=WEGzvZ85dgs What counts as the world's shortest river?]&lt;br /&gt;
||What lake has the largest surface area in the world? What is the world's deepest lake? What lake is recognized by the Guinness World Records as the world's smallest? (Benxi Lake in China).&lt;br /&gt;
|-&lt;br /&gt;
|4. Which Steven Spielberg movie features more shark attacks, {{w|Jaws (movie)|''Jaws'' (1975)}} or {{w|Lincoln (movie)|''Lincoln'' (2012)}}?||Trivial||''Jaws'' is a famous movie about a killer shark, and features at least five fatal shark attacks. Lincoln is a movie about the passage of the Thirteenth Amendment to the U.S. Constitution, containing zero shark attacks.{{Citation needed}} Anyone with even a passing familiarity with American popular culture should be able to get this one right, and someone with no knowledge could likely guess the answer from the titles alone. This might be mistaken for a silly trick question, as ''Lincoln'' is a much less famous movie.||How many times is a shark seen on screen in ''Jaws''? Which film won more {{w|Academy Awards}}? How many fatal shark attacks occur in ''Jaws''? Which movie in the ''Jaws'' franchise has the most shark attacks?&lt;br /&gt;
|-&lt;br /&gt;
|5. How many planets were there originally?||Ambiguous||The question doesn't specify a time frame or culture, which is necessary to understand both the word 'planet' and the word 'originally'. It could be referring to the {{w|classical planets|original meaning of the word planet}}, which in antiquity referred to the Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn (total of 7 planets). It could be referring to the planets originally known to the quiz master, which (assuming Cueball is between 18 and 96 years old) would be after the reclassification of Ceres, Pallas, Vesta and Juno to asteroids, and after the discovery of Pluto, but prior to the reclassification of Pluto to dwarf planet (total of 9 planets). It could conceivably be referring to the first official definition of planet by the International Astronomical Union in 2006, which would be Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune (total of 8 planets). It could be referring to the process of planetary formation, in which case another layer of ambiguity is added, as it could be referring to the number of protoplanetary bodies in the {{w|protoplanetary disk}} (which is unknown since some of them were destroyed like {{w|Theia (planet)|Theia}}), or the number of planets that accreted from the disk before some were likely ejected (which is also unknown), or how many planets existed when the sun or the universe was formed (which is 0). It also doesn't specify that it's referring to planets in our solar system alone (in the galaxy there are almost certainly trillions of planets). Additionally, it asks how many &amp;quot;were there&amp;quot;, as opposed to how many planets &amp;quot;were known&amp;quot; (the number which we know of being far smaller than the true number of planets in the universe).  ||How many planets were known to Ancient Greece? How many planets were known to science prior to the invention of the telescope? How many planets were recognized in our Solar System at the end of the 20th century?&lt;br /&gt;
|-&lt;br /&gt;
|6. What {{w|NFL}} player has scored the most points outside of a game?||Ambiguous, unknowable||The term &amp;quot;scored the most points&amp;quot; generally only applies within the context of a game, making it very unclear what kind of &amp;quot;points&amp;quot; the question is referring to. Does it mean points in non-NFL games? Points in games other than football? Points outside the context of any game at all (such as 'making a point' in conversation)? Even if this were clarified, points scored in official games in professional sports leagues are meticulously recorded and published, points scored in any other context are not, so the question is likely impossible to answer. Arguably, {{w|Brian Jordan}} would be an answer, with 121 Minor League and 755 MLB runs scored (points).||Which NFL player scored the most points in a game/season/career?   &lt;br /&gt;
|-&lt;br /&gt;
|7. The {{w|Wright brothers}} built the first airplane. Who built the last one?||Unknowable||Orville and Wilbur Wright are widely credited with designing and building the first airplane (in the sense that they invented wing warping, and discounting everybody flying before them without wing warping&amp;lt;!--  - if such a machine should count as an airplane proper remains a controversial subject, taking into consideration the machine created 3 years later by brazilian inventor ''Alberto Santos Dumont'' which falls more in line with what an airplane is expected to be - whether he or the brothers were more deserving of credit for this achievement is debated to this day especially in Brazil, Dumont's country of origin NOT SURE WHAT MAKES THE WRIGHT FLYER LESS OF A PLANE THAN 14-BIS; THE LATTER WORKED, IS WORTHY OF RECOGNITION, BUT THEY BOTH FLEW AND THE FORMER STILL FLEW FIRST --&amp;gt;). In modern times, design and construction of airplanes has become a huge, international industry, with many airplanes of widely varying sizings being built each year. Since airplanes are built continuously, which one was made most recently depends on when the question is asked (and would be very difficult for the average person to know -- and not trivial for even a member of the aerospace industry to know). If it's asking about the last airplane ''ever'', that's impossible to know, since that plane hasn't been built yet{{Citation needed}} (and likely won't for a very long time).||Who built the first airplane '''after''' the Wright brothers?  When was the final Wright Model B aircraft built?&lt;br /&gt;
|-&lt;br /&gt;
|8. Is every even number greater than 2 the sum of two primes?||Unknown, possibly unknowable||This is a famous, centuries-old {{w|open question}} in math known as {{w|Goldbach's conjecture}}. Mathematicians widely believe that it is true, and it has held true for every number checked up to 4 ⋅ 10&amp;lt;sup&amp;gt;18&amp;lt;/sup&amp;gt;, but since it's impossible to check every number, we can't assume it's universally true. No mathematical proof of its veracity exists at this point. Since it is {{w|Gödel's incompleteness theorems|known}} that something can be true but impossible to prove (and, being true, impossible to disprove), this may be the situation forever.||According to which mathematical conjecture is every even number greater than 2 the sum of two primes?&lt;br /&gt;
|-&lt;br /&gt;
|9. Not counting {{w|Canberra}}, what city is the capital of {{w|Australia}}?||No answer exists||Australia has only one capital (unlike some countries, which divide the legislative and administrative capitals, for example {{w|Bolivia}} with {{w|La Paz}} and {{w|Sucre}}), and that capital is Canberra. Hence, by definition, there is no national capital &amp;quot;not counting Canberra&amp;quot;. Though each constituent state also has its state capital, this would still leave us with an ambiguous choice. Before 1927, the answer could be Melbourne, as that was where the Parliament sat at that time. This may be a joke about how other cities, such as Melbourne and Sydney, are often mistaken for the capital of Australia due to Canberra's comparatively small population (roughly 500,000 in the greater metropolitan area, compared to Melbourne and Sydney's roughly 5,000,000 each). It also alludes to the rivalry between Sydney and Melbourne as each claims to be the true capital. ||What city is the capital of Australia?  What is currently the largest city in Australia? What is the smallest state capital in Australia? What city was the most recently founded state capital of Australia? What city was the capital city before Canberra?&lt;br /&gt;
|-&lt;br /&gt;
|10. Who played the drums?||Trivial, yet unknowable without context||As worded, the question could be answered with anyone who's ever played the drums, in any context, whether professional or not, in all of history. This would include a huge number of people, most of whom would not be well-known. Most people would be able to offer a technically correct answer, and almost none of them would be interesting.  Or maybe the host is wondering who it was that played drums that night, as part of the bar's live music.||Who played the drums for some specific band/album/track/concert/tour/time/place?&lt;br /&gt;
|-&lt;br /&gt;
|(Title text) Where is {{w|London}} located? (a) the {{w|British Isles}} (b) {{w|Great Britain}} and {{w|Northern Ireland}} (c) the {{w|United Kingdom|UK}} (d) {{w|Europe}} (or 'the {{w|European Union|EU}}') (e) {{w|Greater London}}||Multiple answers||All choices are technically correct as they are various geographical areas that include the city of London, England. Also note that the City of London is different from the city ''named'' London, as the latter includes a large region around the former, hence (e) as an answer. Answer (d) is both correct and incorrect, as it conflates a geographic region, Europe, and a political body, the European Union. The United Kingdom (and therefore London) {{w|Brexit|left the EU}} in 2020, but is still geographically included in Europe. In addition, answer (b) is not a single geographical designation, but two combined together. Meanwhile, answer (c) is short for the United Kingdom of Great Britain and Northern Ireland, but as well as Northern Ireland and Great Britain (the largest of the British Isles), it includes many other (though not all) surrounding islands, despite these not being mentioned in its full official name. Nonetheless, 'Great Britain' is often used as synecdoche for all of the UK except Northern Ireland (as well as for the UK as a whole), which could make answers (b) and (c), in a loose sense, equivalent. (Answer (a) is a different thing again, including islands that are neither Great Britain, nor part of the UK.) This often confusing {{w|File:British_Isles_Venn_Diagram-en_(3).png|overlapping map}} of definitions and nomenclatures provides fertile ground for tricky quiz questions. This also does not get into {{w|London (disambiguation)|cities named London}} outside of the UK, so for example &amp;quot;Ontario&amp;quot; or &amp;quot;Canada&amp;quot; could also be possible answers [[Black Hat|if the test designer was truly evil]], thus making none of the answers correct. ||What is the capital of the United Kingdom? (answer: London)&amp;lt;br&amp;gt;Where is London, England '''not''' located? (a) the British Isles (b) Great Britain and Northern Ireland (c) the UK (d) Europe (e) the EU (answer: (e))&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[The top half of Cueball is shown beneath the list of questions he is reading aloud. He is holding a wireless microphone in his right hand and a pencil and notebook in his left, reading from the notebook and speaking into the microphone. The list is shown on the notebook as well, but just as unreadable lines.]:&lt;br /&gt;
:Cueball: Welcome to pub trivia! Round one is 10 questions:&lt;br /&gt;
:# Which member of BTS has a birthday this year?&lt;br /&gt;
:# How many sides does a platonic solid have?&lt;br /&gt;
:# What is the smallest lake in the world?&lt;br /&gt;
:# Which Steven Spielberg movie features more shark attacks - ''Jaws'' (1975) or ''Lincoln'' (2012)?&lt;br /&gt;
:# How many planets were there originally?&lt;br /&gt;
:# What NFL player has scored the most points outside of a game?&lt;br /&gt;
:# The Wright brothers built the first airplane. Who built the last one?&lt;br /&gt;
:# Is every even number greater than 2 the sum of two primes?&lt;br /&gt;
:# Not counting Canberra, what city is the capital of Australia?&lt;br /&gt;
:# Who played the drums?&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel]:&lt;br /&gt;
:A local pub trivia place hired me to run bad quizzes at competing bars.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring real people]]&lt;br /&gt;
[[Category:Music]]&lt;br /&gt;
[[Category:Math]]&lt;br /&gt;
[[Category:Geography]]&lt;br /&gt;
[[Category:Fiction]]&lt;br /&gt;
[[Category:Sharks]]&lt;br /&gt;
[[Category:Astronomy]]&lt;br /&gt;
[[Category:American football]]&lt;/div&gt;</summary>
		<author><name>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2948:_Electric_vs_Gas&amp;diff=344990</id>
		<title>Talk:2948: Electric vs Gas</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2948:_Electric_vs_Gas&amp;diff=344990"/>
				<updated>2024-06-24T20:53:17Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: /* Friendly Reminder */&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;
&lt;br /&gt;
Now I'm not a fan of gas engines, but that argument is in bad faith. Gas engines have one ''very big'' advantage over electrics: Energy density, and by extension, range. Batteries can't come close to the energy density of hydrocarbons, despite the latters' overall lower efficiency. --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 17:22, 19 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
:I think that's one of the main arguments for hybrid systems. Using a gas engine to charge an electric motor, and then using the electric motor to actually power the appliance, enables significant efficiency gains. If anything, combining the technologies enables even greater ''usable'' energy density from hydrocarbons. Hybrid electric vehicles for example are extremely efficient. [[User:Eunakria|Eunakria]] ([[User talk:Eunakria|talk]]) 17:43, 19 June 2024 (UTC)&lt;br /&gt;
:Energy density, and the ability to move large amounts of stored energy from one place to another quickly and easily (aka pump gas, vs charge or swap a battery), from a thermal and maintenance perspective.  (Which is not entirely unrelated to energy density.) [[Special:Contributions/172.70.39.54|172.70.39.54]] 18:08, 19 June 2024 (UTC)&lt;br /&gt;
::Swapping batteries (and slowly charging the batteries in the swap station) could offer comparable &amp;quot;charge&amp;quot; times to gasoline refuelling times, while also being better for battery lifespan, but would require industry coordination and standardisation re: battery packs and install location that, sadly, simply does not exist. [[Special:Contributions/172.70.42.212|172.70.42.212]] 19:54, 19 June 2024 (UTC)&lt;br /&gt;
::Plug-in hybrids have been superior since 1904, but the incremental capital cost is still an issue while oil is under $100/bbl. [[Special:Contributions/172.71.150.129|172.71.150.129]] 19:16, 19 June 2024 (UTC)&lt;br /&gt;
::A litre of gasoline provides 31.5MJ of energy, and in the US a pump transfers 38 litres (10 USgal) per minute, or 0.633 litres per second. That's an energy throughput of 31.5MJ/l x 0.633 l/s = 19.95MW. And US gasoline pumps are, by law, slow. In the civilised world, petrol pumps can deliver 30% more (50l/minute). Hi-flow diesel pumps used to fill trucks and buses are much faster - between 80 and 120 litres per minute. 120 litres per minute of diesel fuel is an energy transfer rate of about 76MW. By comparison, the fastest 3-phase AC chargers for the Tesla model 3 charge at 11kW; Pumping gas is about 2,000 times faster at getting energy into a car than this. The fastest single phase chargers are 7.4kW; While a standard wall socket charger can manage a paltry 2.3kW, (around a ten-thousandth of the energy transfer rate of a gas pump). The &amp;quot;super&amp;quot; DC charging stations achieve an &amp;quot;impressive&amp;quot; 250kW, making pumping gas at a regular gas station about eighty times faster than using one of these. [[Special:Contributions/172.68.64.207|172.68.64.207]] 07:00, 21 June 2024 (UTC)&lt;br /&gt;
: Except of course that this isn't quite as simple as this.  A Honda Civic (one the most popular US petrol cars) will go about 400 miles on a full tank, about the same as a Dodge Ram.  Also about the same as a Tesla Model S.  There's a pretty good reason this isn't a coincidence - people don't want more much more range, and a bigger tank is more weight.  A Chevy Silverado full tank will go about 500miles.  If you really want range, you need to look at a hybrid car.  As the comic points out, the torque on a standard otto cycle engine is poor, but that cycle is deliberately designed to give more torque.  Hybrids use an Atkinson cycle which is far more energy efficient, but could not provide enough torque - so you use the electric to do that.  A Prius has a range in excess of 630 miles, more than any popular petrol car.  So if you want range, you still want an electric engine, just store the energy in hydrocarbons.  For similar reasons, diesel trains use the diesel to run generators which then power the electric motors on the wheels, and have done for decades. {{unsigned ip|172.70.162.186|20:47, 19 June 2024}}&lt;br /&gt;
:: Which brings us back to energy density: The Honda Civic has a similar range to the Tesla – at 10% the weight for its fuel (vs. the Tesla's battery), and one-third the volume. The comparison gets even worse for long-haul cargo, but that might be beyond the topic of this conversation. --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 13:06, 20 June 2024 (UTC)&lt;br /&gt;
:How about we make an actual list, then?&lt;br /&gt;
:{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|+ Electric v. Gas Engines&lt;br /&gt;
|-&lt;br /&gt;
! +/- of Electric Cars !! +/- of Gas Cars&lt;br /&gt;
|-&lt;br /&gt;
| -Energy Density/Range || +Energy Density/Range&lt;br /&gt;
|-&lt;br /&gt;
| -Battery Life || -Fuel Efficiency&lt;br /&gt;
|-&lt;br /&gt;
| -Toxic Rare Earths || -Fossil Fuels&lt;br /&gt;
|-&lt;br /&gt;
| +Cleaner || -Motor Power&lt;br /&gt;
|-&lt;br /&gt;
| -Decrease Efficiency in Winter || +Lower Vehicle Weight&lt;br /&gt;
|}  [[User:Fephisto|Fephisto]] ([[User talk:Fephisto|talk]]) 13:45, 21 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
:Isn't the comic just making the claim that electric ''motors'' are superior to gas engines? It's not saying anything about how easy it is to supply energy to the motor/engine, or anything about their use in transportation. Given that, I don't think there's anything particularly contentious here? [[User:Syperk|Syperk]] ([[User talk:Syperk|talk]]) 04:56, 22 June 2024 (UTC)&lt;br /&gt;
::Motors without fuel are all equally useless. --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 08:19, 23 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
On the other other hand, in a lot of cases an electric motor is just a gas engine with extra steps due to the current state of the power grid. [[Special:Contributions/172.68.174.232|172.68.174.232]] 17:24, 19 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
:Not here in Washington State it isn't. Most of our electricity comes from hydroelectric dams. [[User:RadiantRainwing|RadiantRainwing]] ([[User talk:RadiantRainwing|talk]]) 23:10, 19 June 2024 (UTC)&lt;br /&gt;
:: AFAIK, no new dams are being built, and I reckon that the probability is vanishingly small that any new dam that is mooted will survive the inevitable storms of protest and get built. The trend, rather, and the political pressure, salmon fans, is to remove dams (e.g. those on the Elwha River). The existing dams are aging, their impoundment volumes are dwindling due to sedimentation, and the water for those impoundments is increasingly bespoke and is, in at least some cases, declining in volume due to climate perturbations. The population, and its energy use, is increasing. As of 2022, [https://www.eia.gov/state/?sid=WA#tabs-1 I read], WA was a net exporter of electricity. I would not be taking that status for granted. A few years ago, a study was published, finding that, in states where the electricity grid was dependent on fossil-fuel-fired plants, electric cars had a &amp;lt;em&amp;gt;greater&amp;lt;/em&amp;gt; carbon footprint than gasoline/petrol cars - and this was before the major gains in gasoline fuel efficiency contributed by advances in computer tech (2007 Honda Civic hybrid gets the same city mileage, ca. 35 mpg, as a 2021 Honda Civic petrol engine, in my hands). I do not know what current assessments say about this. [[Special:Contributions/172.71.150.129|172.71.150.129]] 04:23, 20 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
:I'd say an electric motor powered by a hydrocarbon grid still usually makes better use of gas than a typical gas engine. Gas engines that don't always run at full throttle (as in, a gas engine in an appliance) have dramatically worse efficiency than electric motors that don't always run at full throttle. It depends ''very'' heavily on use case, though; always take measurements and run the numbers before coming to a specific conclusion. Science would be nothing without empirical data. [[User:Eunakria|Eunakria]] ([[User talk:Eunakria|talk]]) 17:50, 19 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Should this have [[:Category:Climate change]]? I can’t decide. [[User:Usb-rave|Usb-rave]] ([[User talk:Usb-rave|talk]]) 17:40, 19 June 2024 (UTC)&lt;br /&gt;
:Yeah, it's better with it for people looking though the category later on, they will want to see it. [[Special:Contributions/162.158.186.10|162.158.186.10]] 19:13, 19 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Honestly, with this argument the thing gas engines have going for them over EVs is the refueling time and availability. [[Special:Contributions/172.69.59.175|172.69.59.175]] 18:58, 19 June 2024 (UTC)&lt;br /&gt;
:That's fair. It would be nice if electric cars had been more focused-on ten years ago than the trend (trend? craze? idea? whatever.) starting now. I refuse to buy a Tesla, though. Elon is never getting my money. I'm waiting for an electric Volvo. [[User:Psychoticpotato|P?sych??otic?pot??at???o ]] ([[User talk:Psychoticpotato|talk]]) 13:27, 20 June 2024 (UTC)&lt;br /&gt;
::As in...you've ordered one, or you hadn't realised they exist?[[User:Yorkshire Pudding|Yorkshire Pudding]] ([[User talk:Yorkshire Pudding|talk]]) 21:00, 20 June 2024 (UTC)&lt;br /&gt;
:::Wait they're real? Need. [[User:Psychoticpotato|P?sych??otic?pot??at???o ]] ([[User talk:Psychoticpotato|talk]]) 08:26, 22 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
It's really remarkable how uninformed and unintelligent this comic is, to the point where I now doubt the veracity of his entire What If? series. {{unsigned ip|172.70.114.62|19:13, 19 June 2024}}&lt;br /&gt;
:To be fair, there’s sort of an agenda here, while I don’t believe there’s one in ''What If?'' I can’t independently verify the accuracy of ''What If?'', of course, but there is that. [[User:Usb-rave|Usb-rave]] ([[User talk:Usb-rave|talk]]) 19:18, 19 June 2024 (UTC)&lt;br /&gt;
:I'd like to know more about the &amp;quot;uninformed and unintelligent&amp;quot; assessment. Given that not all of Randall's characters copy his ''exact thinking''. I don't think he'd espouse much of what he has Black Hat say/do. And clearly many of his Cueballs, even being often accepted as Author Avatars, can be clearly being dumber than Randall (who is 'writing them as dumb') is. What we have is parody. And maybe you just don't see the parody in the way intended (or understood by others). Perhaps you have a completely different mindset, or are just inclined to be anti-Randall&amp;gt; (Even in things he's actually right about...) I don't know where the mismatch may be here, but if you're seriously thinking that there remains not one useful take-away from anything Randall has ever said, just from the ''possibility'' that his cartoon characters don't completely mesh with what you perceive as a correct worldview, then this needs looking at from a different perspective than just reassessing the whole ''What If?'' corpus. [[Special:Contributions/162.158.74.24|162.158.74.24]] 23:15, 19 June 2024 (UTC)&lt;br /&gt;
: The tagline for the xkcd comic does include the word &amp;quot;sarcasm&amp;quot;, which should warn against over-serious or over-literal interpretations. Not infrequently, I find, xkcd ventures into the realm of the sarcastic, the opinionated, even the polemic (cf. the Hilary Clinton campaign ads), and this one states a clear opinion in favor of electric cars ... with which one is free to debate (as here, exhaustively), or disagree. All of which brings the cartoonist to the attention of the world, and thereby supports him in his chosen line of work, which, in the current state of cartooning as a profession, is no small accomplishment. As for the opinion, consider the following question: &amp;quot;I have a four-mile commute to work. Which is the most eco-friendly option? The electric car? The hybrid? The gas/petrol car?&amp;quot; Answer: the foot car. Walking the four miles is the only minimum-carbon solution under all circumstances ... except perhaps ones that allow the questioner to keep deir job. [[Special:Contributions/108.162.245.4|108.162.245.4]] 05:39, 20 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Ohhh... OK. I had poor signal so this one took a while to load, and I only saw the &amp;quot;Gas vs. Electric&amp;quot; title. I thought it was going to be about kitchen stoves - ones that burn ''actual'' &amp;quot;gas&amp;quot;, vs. electrical heating elements. [[User:Yorkshire Pudding|Yorkshire Pudding]] ([[User talk:Yorkshire Pudding|talk]]) 19:45, 19 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
I actually experienced the &amp;quot;cons&amp;quot; of a less limited degree of power and not being noisy at all, today. Someone in an electric vehicle (could have been a Tesla) pulled out of a sideroad, accelerating at what seemed like a reckless rate (it was advantageous to do so, but a petrol-powered vehicle that might have taken a bit longer to switch up the gears would still have been up to speed soon enough to not get into contention with any other vehicles). And with barely more than a whine, and perhaps a bit of road-noise that might have included at one point a bit of grit-splattering. I was watching this, and knew they were pulling out of the junction (and knew for certain, moreover, that there was no traffic coming up or down the road, nor anybody crossing the road anywhere in my rather long sight). Had there been someone ''actually'' about to cross the road (within the next 50 yards or so), however, it would have been entirely possible that they would have been caught be surprise by this near-silent and suddenly fast-moving vehicle. If it was a Tesla, then maybe its inbuilt forward 'radar'/whatever would have helped bring the vehicle to a stop, or at least slow it down/stop if from speeding up enough, before any actual accident might have happened... but this is theoretical, as it just happened not to happen anything like this on this occasion... But it could have. And the paradigm for crossing the road that I learnt several decades ago of &amp;quot;Stop, Look, Listen, Think&amp;quot; has probably now started to lose out on the &amp;quot;Listen&amp;quot; bit, and possibly degraded even the &amp;quot;Look&amp;quot; and &amp;quot;Think&amp;quot; until we start to retrain ourselves to anticipate vehicles whipping around random corners that are far more silent-and-deadly then what we've all become used to. Ok, so this is not necessarily the total fault of the electric vehicles (or even the drivers, but they must have ''some'' hand in the matter), but in changing the dynamics and situational awarenesses of road traffic so much it ''might'' be considered a relatable problem. [[Special:Contributions/162.158.74.24|162.158.74.24]] 23:51, 19 June 2024 (UTC)&lt;br /&gt;
: I drove an electric motorcycle for a while, which put me quite exposed and aware of safety and my driving environment.  The concerns about EVs being too quiet don't come across as grounded in reality.  Modern ICE vehicles typically have minimal engine noise already.  There are really two cases: out on the road, where half the people (exaggerating) have their earbuds in, and any engine noise is swamped by tire noise anyway.  No difference between ICE and electric here.  Then in a parking lot, where tire noise is not significant, and maybe pedestrians could get extra auditory cues about the vehicles around them from ICE engine noise.  In that context, I personally would flip open my visor and make eye contact with pedestrians.  It would be nice if drivers of full-sized cars and trucks, no matter their power source, would do more of that.  Driving while inattentive is unambiguously bad. [[Special:Contributions/172.69.23.204|172.69.23.204]] 02:40, 20 June 2024 (UTC)&lt;br /&gt;
: Rolling noise becomes more than enough for safe audibility by about 30 km/h (below which speed collisions are relatively less dangerous anyways, though most urban streets really should have a speed limit of 20 km/h for numerous reasons including safety), and actually dominates engine noise by about 55 km/h. ICEs are loud enough to have like a dozen deleterious health effects even while idling, though the noise of a bicycle, if sufficiently constant, is enough to reach the WHO threshold. In short, electric cars only need to make additional noise below about 30 km/h for safety, and even then only 55dBA, quieter than typical speech, and even then only if there's already a lot of noise polution to drown them out. [[Special:Contributions/162.158.146.33|162.158.146.33]] 07:23, 20 June 2024 (UTC)&lt;br /&gt;
::Although really what they mostly need is drivers who look where they're going, and don't assume that people will just get out of their way when they hear them coming.[[Special:Contributions/172.69.195.124|172.69.195.124]] 08:44, 20 June 2024 (UTC)&lt;br /&gt;
::: Which is best accomplished using narrower streets, bollards, and other traffic easing mechanisms that make people want to slow down and pay attention rather than putting up a lower speed limit sign and just expecting people to obey it. That goes double in the US where most speed limits are assigned by looking at the speeds people are actually driving in good conditions and setting it where 10% of people woulld be speeding (and then rounded to the nearest 5 mph), meaning the sign is literally irrelevant to almost everyone. Oh, also, we desperately need to stop combining streets, which are destinations, with roads, which are thoroughfares, into &amp;quot;stroads&amp;quot; that fail at being both; that's an actual majority of your traffic easing taken care of basically in one step. [[Special:Contributions/162.158.146.234|162.158.146.234]] 10:01, 20 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
I wonder if the current explanation is missing the forest for the trees. My impression was that White Hat was parroting a ChatGPT-style response -- noncommittal and logically incoherent. (In fact, I missed the logical non sequitur the first time I read the strip. The style just screamed to me ChatGPT, though.) [[Special:Contributions/172.71.154.9|172.71.154.9]] 00:55, 20 June 2024 (UTC)&lt;br /&gt;
: I agree about missing the forest for the trees.  Everyone's so focused on the opinions being expressed, they're totally missing what to me is the whole point of the comic: poking fun at similar kinds of pro vs. con comparisons but where some/any/all of the points are actually on the wrong side of the argument. So while on the surface the comparison appears balanced, it's actually incredibly biased. Sure all of that stuff is interesting for those wanting to know more about the actual pros and cons of the particular subject being discussed; but that's just the vehicle Randall happened to choose for delivery. Now I'm not sure if ChatGPT / AI plays into this, aside from it probably being more likely to produce this kind of unintentionally biased comparison; but I'd assume given the absence of cues implying as much that this comic is not related to AI. [[Special:Contributions/172.71.146.236|172.71.146.236]] 19:06, 20 June 2024 (UTC)&lt;br /&gt;
:: Forgive me, but I believe &amp;quot;where some/any/all of the points are actually on the wrong side of the argument&amp;quot; has been well covered. Stating a couple of IC-Cons/EV-Pros ''as if'' EV-Cons/IC-Pros (and possible reasons why they could reinterpret things that way). Or is there yet another objection, and you aren't also meaning that? [[Special:Contributions/172.70.91.64|172.70.91.64]] 20:08, 20 June 2024 (UTC)&lt;br /&gt;
::: It's touched on, barely; but most of the explanation (and commentary) is so focused on rehashing the arguments for/against the different types of vehicles that it's easy to miss.  I'm sure those topics are already well covered elsewhere, do we really need to go into so much detail here? [[Special:Contributions/172.71.151.96|172.71.151.96]] 18:19, 21 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
This comic was posted yesterday and I'm already seeing people typing essays. I'm scared. (also electric rules gas drools nyehh) [[User:Psychoticpotato|P?sych??otic?pot??at???o ]] ([[User talk:Psychoticpotato|talk]]) 13:22, 20 June 2024 (UTC)&lt;br /&gt;
: Not too shabby a result from a stick-figure drawing posted on the Internet. Jealous? As for 'electric', nice to see your unqualified support for [https://www.npr.org/sections/goatsandsoda/2023/02/01/1152893248/red-cobalt-congo-drc-mining-siddharth-kara slave labor in the Congo] and elsewhere. Get a horse! [[Special:Contributions/172.68.23.73|172.68.23.73]] 13:40, 20 June 2024 (UTC)&lt;br /&gt;
:: Isn't a horse also a form of slave labour?[[Special:Contributions/172.71.242.223|172.71.242.223]] 13:52, 20 June 2024 (UTC)&lt;br /&gt;
::: PETA would likely agree with you, to the point of sabotage if widespread re-introduction of bestial labor looked like being a thing. So, if we shut down the electricity grid to quell the AI revolt (if resource limitations don't compel that shutdown sooner), and we are denied fossil fuels for reasons of climate destruction and, again, resource limitation, this time-honored path to civilization will likewise be refused us. At least initially ... [[Special:Contributions/172.71.147.133|172.71.147.133]] 01:47, 21 June 2024 (UTC) &lt;br /&gt;
::There are several things wrong with your assessment, [[Special:Contributions/172.68.23.73|172.68.23.73]] (although I do wish my comics got this much attention). The first is your assumption that I know the exact methods used to gather battery materials (I don't). The second is saying I support slave labor, which I '''''ABSOLUTELY DO NOT.''''' The third is your assumption that I have the space, money, resources, skills, and time to purchase and take care of a horse. I don't! Slave labor is appalling, the DRC is a nightmare, and horses have more needs than I could fit into a week. Back to electric cars, though: they're generally better for the environment, they're quieter, they're more powerful, and their engine systems are really cool and fun to look at and see in action. Gas(oline) engines are loud, smelly, pollution-heavy, and subject to violent explosions in a crash. Electric is better in general. It's a good idea to manufacture them, but I agree with you on the need for changing battery material-harvesting methods. [[User:Psychoticpotato|P?sych??otic?pot??at???o ]] ([[User talk:Psychoticpotato|talk]]) 17:26, 20 June 2024 (UTC)&lt;br /&gt;
::: I argue that knowing the state of the electric-economy supply chain, the resources needed and [http://large.stanford.edu/courses/2023/ph240/cadicamo1/ the limitations on their availability] as well as how they are procured, is necessary for any informed stance. I argue further, if you and I are wantonly snapping up electric gadgets, and, as is typical, are scouring the Internet for the cheapest possible prices for those gadgets, then you and I are screaming our support for human slavery in the only term$ that matter. The cry &amp;quot;Get a horse!&amp;quot; was a catcall aimed by horse owners at owners of early 20th-century automobiles, which were orders of magnitude dirtier and smellier than today's machines, were essentially non-functional, and took insignificantly less labor to maintain than the horse. You are absolutely correct about the maintenance needs of a horse, and indeed most people in the &amp;quot;horse and buggy days&amp;quot; couldn't afford either the cost or the time to own one. They were symbols of the 1% - who had slaves, be they chattel or hireling, to maintain their stables. From where I sit, the issues associated with actually realizing the fantasy of an electric economy are far more existential than changing battery-material harvesting methods, and I no longer accept that We the People will, or even can, face up to, never mind resolve, the issues. [[Special:Contributions/172.71.147.133|172.71.147.133]] 01:47, 21 June 2024 (UTC)&lt;br /&gt;
:::: Sounds like [https://www.visualcapitalist.com/every-single-cognitive-bias/ selective outrage] to me. Do you have a clue what kind of disaster the fossil fuel industry has wreaked (and continues to wreak) upon the world? [[Special:Contributions/162.158.166.214|162.158.166.214]] 06:22, 21 June 2024 (UTC)&lt;br /&gt;
::::: Damage from the Industrial Revolution has been plain in lake sediment cores from northeastern North America dating from the 1850s. To name one; picked this one because of peripheral (taxonomy of the organisms used in the assessment) association with the work and [https://www.queensu.ca/research/researchers/john-p-smol its lead researcher]. My beef is with those who think that [https://www.dude-n-dude.com/2020/08/23/kris-an-murphy-wunderwaffe/ the technology that got us into this mess will somehow pull us out], in the absence of evidence [https://www.dude-n-dude.com/2023/07/22/amoebas-lorica-setiback/ that people will stand the financial and standard-of-living sacrifices necessary to make it happen] - witness, for example, the lot of us arguing pointlessly about this on our carbon-belching computers. [[Special:Contributions/172.68.22.90|172.68.22.90]] 22:10, 21 June 2024 (UTC)&lt;br /&gt;
::::: I read a press account, recently, about how a group of scientists and engineers plan to deploy a giant umbrella to shade the Earth from incoming solar radiation and thereby interrupt global warming; the latest in {{w|Space sunshade|a series of such ideas}}. It immediately called to mind the Road Runner cartoon, in which Wile E. Coyote, despairingly, put up a tiny, tattered parasol to protect himself from the anvil that was descending on him. [[Special:Contributions/162.158.41.120|162.158.41.120]] 22:23, 21 June 2024 (UTC)&lt;br /&gt;
:::::: It is, as I'm sure that wikilink says, an old, old idea (and a bit discredited in the eyes of those who think that putting a sticking plaster on won't stop us from the juggling with knives, and having more fumbles, for which the sticking plaster is ''supposed'' to be a treatment for). I'm surprised it's been seriously brought up recently, not least because you'd have to deploy a truly massive shade (not Earth-sized, perhaps not even Moon-sized, but certainly orders of magnitude larger than we have any current experience, or hope, in constructing) to produce a significant effect, and only doing that by denying a significant part of the Sun's energy from both natural and man-made solar-energy receivers in selected areas of Earth. (Imagine the uproar, as certain countries get 'shaded' and neighbours do not, by adjusting the largely Sun-synchronous (''or'' full-on Lagrangian) orbit. And it is in the power for the shade-operators to change which one(s) are effected, hence they could be considered/accused culpable for any unwanted effects, or just from perceived disadvantages and cultural objections.)&lt;br /&gt;
:::::: But it ''would'' be better than an 'anti-anvil parasol', because any worthwhile attempt would have to be effective enough to actually produce a measurable effect (which is all that might be needed to go over the tipping point, or not, at present), whereas Wile. E.'s attempt is instant fail. [[Special:Contributions/172.70.85.240|172.70.85.240]] 07:55, 22 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
and now i know why xkcd doesn't have a comments section. [[user talk:lettherebedarklight|youtu.be/miLcaqq2Zpk]] 07:35, 21 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
That the argument is fallacious is the point. It is hardly a first for white hat. It shouldn't be seen as a serious &amp;quot;pros and cons&amp;quot; argument, it would be obvious to anyone reasonable, including Randall, that there are real cons to EVs (how important they are is up to debate). But as evidenced by previous comics, white hat is not particularly reasonable. [[Special:Contributions/172.71.130.143|172.71.130.143]] 11:27, 21 June 2024 (UTC)&lt;br /&gt;
:Rather than &amp;quot;not particular reasonable&amp;quot; (more the realms of Black Hat), I'd have said &amp;quot;not particularly rational&amp;quot;/similar is White Hat's schtick. But I do agree with you in principle, and don't understand half the 'objections' above, if serious. [[Special:Contributions/141.101.99.172|141.101.99.172]] 13:29, 21 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
I think that the real meaning of this comic is that the author of XKCD now makes enough money to afford an EV. Must be nice. {{unsigned ip|162.158.154.31|14:58, 22 June 2024}}&lt;br /&gt;
:...yeah, but no. I don't know where you get that. (If he can afford a new car, good on him, but I doubt it'll anything related.) [[Special:Contributions/141.101.99.126|141.101.99.126]] 21:06, 22 June 2024 (UTC)&lt;br /&gt;
::It could be that he can now afford an EV but not an ICE (which is significantly more expensive to operate, unless you buy it to keek all the time in the garage).&lt;br /&gt;
::Seriously, it's more likely that he wants to make the point that nowadays almost all supposed problems with EVs are really not relevant anymore. What is ironic is that some readers of XKCD try to propagate some myths against EVs.&lt;br /&gt;
::A very good starting point on the subject is the 2018 report by the European Environmental Agency (https://www.eea.europa.eu/highlights/eea-report-confirms-electric-cars) which in 2018 clearly debunked any myths about EVs not being really green. We're talking about vehicles, here, not just motors. Also, they emit way less particulate, because of regenerative braking, no fuel burning, absence of particulate-generating parts such as clutches. Modern researhc on particulates, as cited by EEA, is almost unanimous in describing lower particulate emissions, even though the rate of diminution varies according to the scenario.&lt;br /&gt;
::Battery recycling is often cited as a &amp;quot;problem&amp;quot;. It should be considered a problem in the mathematical sense, such as the &amp;quot;two body problem&amp;quot; which is called a &amp;quot;problem&amp;quot; despite having been solved. We currently know perfectly well what will happen to used car batteries, and the solutions are already available.&lt;br /&gt;
::Finally, EVs are much more reliable than modern ICEs because mechnically they are much simpler. Problems can happen more easily in software, which is a problem with all modern cars. Diesel cars can have larger software, with functions such as emission-cheating which aren't needed on EVs and aren't really desirable.&lt;br /&gt;
::--[[Special:Contributions/162.158.129.162|162.158.129.162]] 22:40, 22 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Do you suppose it's coincidence that this comic came out just six days after Will Prowse (DIY Solar Power youtube channel) put out an opinion video [https://www.youtube.com/watch?v=hkabBP85e2I] on EVs?[[Special:Contributions/172.69.22.220|172.69.22.220]] 08:05, 23 June 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
== Friendly Reminder ==&lt;br /&gt;
I'd like to remind everyone here that we want to explain _the comic_ and NOT the pros and cons of EV vs ICE. I'll admit the explaining the points White Hat is making might be in order, anything below that is not necessary for explaining _the comic_. Also, the comic is, as others already pointed out, about engines and NOT about vehicles in general or cars in particular. The etymology of gas(oline), albeit already in trivia, is entirely irrelevant here. As are sales statistics for bikes. [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 10:24, 24 June 2024 (UTC)&lt;br /&gt;
:Given the &amp;quot;oh, this isn't electric vs gas ''cookers''&amp;quot; comment, it's probably good to explain that it's gasoline ''fuel'', not natural gas (ethane, mostly)/propane/whatever. I don't know how Leftpondians swerve the confusion between the productand the general state of matter (there'll be times when context ''doesn't'' make it abundantly clear, I imagine), and for the sake of the English speaking world who might not yet have have an internal autotranslate  between Amercanized terms and Anglicised ones, it seems like someone thought it was useful. As for the etymology, I always understood it as being originally '''gas'''-''condensate'' (i.e. heavier molecules, falling out of suspension) of cyclic organic compounds ('''-ole'''s, though not necessarily as in strictly &amp;quot;azole&amp;quot;-like) with a fuzzy final suffix ('''{{wiktionary|-ine}}''' ) that might be either a commercial, nominatve ''or'' chemical-name rooted tack-on. Given that gasoline isn't gaseous (or really shouldn't be, to any great degree, during most relevent handling/storing!) I think naming it after its fumes (not exactly obvious, not compared with things like bromine) sounds like a stretch.&lt;br /&gt;
:But being entirely a tradename (or corruption/mutation of one) covers a multitude of possibilities. Because tradename-namers aren't known for their strict logic in putting together technobabble phonemes to 'sound good', whilst buffing up (or sneaking in) whatever key surname/etc is investing in the product's retail. So long as kt sounds good/sounds a bit like various competitor names and yet doesn't sound ''so'' much like another product as to cause 'problems' (legal or commercial, depending upon what's the biggest issue). [[Special:Contributions/172.69.43.227|172.69.43.227]] 13:05, 24 June 2024 (UTC)&lt;br /&gt;
::I could tell you the whole tale of a particular confusion between &amp;quot;gas and air&amp;quot; (the breathable mix used to numb the pains of childbirth) and &amp;quot;gas and air&amp;quot; (two things available to top up vehicles at a roadside facility) and how, for the longest time, the teller and the listener were on completely different pages of the reciting of a mad dash taking the teller's wife to the hospital when her waters broke... But it wouldn't do justice to the actual experience of seeing the misunderstandings roll out. We'd heard the tale already, and weren't chipping in, meaning we could pick up on the confusion of the newest listener. [[Special:Contributions/172.70.90.99|172.70.90.99]] 20:53, 24 June 2024 (UTC)&lt;/div&gt;</summary>
		<author><name>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2943:_Unsolved_Chemistry_Problems&amp;diff=344466</id>
		<title>2943: Unsolved Chemistry Problems</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2943:_Unsolved_Chemistry_Problems&amp;diff=344466"/>
				<updated>2024-06-17T08:45:39Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2943&lt;br /&gt;
| date      = June 7, 2024&lt;br /&gt;
| title     = Unsolved Chemistry Problems&lt;br /&gt;
| image     = unsolved_chemistry_problems_2x.png&lt;br /&gt;
| imagesize = 361x386px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = I'm an H⁺ denier, in that I refuse to consider loose protons to be real hydrogen, so I personally believe it stands for 'pretend'.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a caffeinated biochemist - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
Every field of research has [[:Category:Incomplete explanations|unsolved problems]] considered &amp;quot;important&amp;quot; or &amp;quot;significant&amp;quot; that motivate continued research. The scientists at what is apparently the &amp;quot;grand opening&amp;quot; of their new chemistry lab list several real chemistry problems, followed by one also-unsolved-but-less-scientific problem (the p in pH) &lt;br /&gt;
&lt;br /&gt;
'''Arbitrary Enzyme Design:''' &lt;br /&gt;
&lt;br /&gt;
{{w|Enzymes}} are catalytic proteins. Enzyme catalysis is often unique in comparison with other catalysis methods as it is highly specific, or tailored to a specific reaction. As such, enzyme catalysis, besides being the basis of all biochemical processes, is becoming increasingly relevant to industrial synthesis processes. As enzymes can easily be produced synthetically through recombinant gene technology, being able to design an arbitrary enzyme for any reaction would mean that effectively any reaction could be relatively easily catalyzed, revolutionizing the chemical synthesis industry.&lt;br /&gt;
&lt;br /&gt;
'''Protein Folding:'''  &lt;br /&gt;
&lt;br /&gt;
{{w|Protein|Proteins}} are large molecules that consist of chains of amino acids.  These amino acids chains become {{w|Protein Folding|folded}} in extremely complex ways into intricate 3D structures, and the way a protein is folded is of critical importance to its function.  Because of the huge importance of proteins to biological life, biologists have devoted significant attention over many decades to the problem of {{w|Protein structure prediction|protein structure prediction}}.  This refers to the ability to predict the 3D structure of a protein based on the amino acid sequence, and remains one of the most important problems in computational biology. The ability to predict protein structure purely from amino acid sequence, the so-called &amp;quot;de novo&amp;quot; prediction, is known in computational biology as an unusually difficult problem due to the complexity of amino acid chains. Known as &amp;quot;Levinthal's paradox,&amp;quot; the number of possible conformations from the backbone conformations alone is estimated to have in the ballpark of 10^300 different conformations. Despite this, protein folding occurs extremely quickly in reality. Because of this difficulty in sampling conformations, even with optimization, such as secondary structure prediction and Monte Carlo simulation, a &amp;quot;true&amp;quot; accurate simulation is extremely computationally expensive. Because of this, the most accurate solutions, such as AlphaFold, utilize a combination of homology modeling - sampling experimentally determined proteins with similar sequences to infer structural motifs and similarities - and deep learning to accurately guess protein structure. See also [[1430: Proteins]].&lt;br /&gt;
&lt;br /&gt;
'''Depolymerization:'''&lt;br /&gt;
&lt;br /&gt;
Polymers are very large molecules formed out of repeating subunits called monomers. Monomers are molecules, typically organic in nature, that can bond with at least 1 other molecule, with chains of 2 or more making long chains or networks called polymers. That process is known as polymerization. Depolymerization is breaking down polymers into the small molecules they were originally made from. This is done through a variety of processes such as using radiation, electrolysis, adding chemicals, and other means. Plastics are the best-known polymers, but cellulose, proteins, and DNA are also technically polymers. The huge number of varieties and mixtures in plastics makes recycling them a huge challenge, and there is increasing concern about plastic waste damaging the environment.&lt;br /&gt;
&lt;br /&gt;
Polymerization is usually exothermic, releasing energy as heat. To reverse this would require adding energy, in a targeted way. Simply ''destroying'' a polymer, by means of highly-reactive chemicals, heat, or radiation, doesn't generally release the monomer molecules to a significant degree; most of the reaction products are highly degraded. Most polymers are made by a process of catalysis, with the small monomer molecules interacting via a catalyst structure, often in liquid form, and the eventual product is usually solid. To reverse this would require getting the catalyst to interact in a very precise way with the solid polymer, and it's relatively difficult for the catalyst structure to get into the proper configuration with the solid tangled polymer molecules.&lt;br /&gt;
&lt;br /&gt;
Another highly-desired depolymerization process would be to convert cellulose into its component glucose molecules. That glucose could then be used for a variety of different purposes, including fermentation to alcohol to use as a fuel. Currently, when plants are grown, much of the solar energy and carbon dioxide they absorb ends up in the form of cellulose rather than as starch, sugar, protein, or other substances that we find useful. Our being able to make use of the cellulose would make farming much more energy-efficient. Some organisms are able to depolymerize cellulose by means of enzymes, but our ability to use similar processes on an industrial scale is still limited. (Those organisms use a complex multi-step biochemical process which essentially &amp;quot;invests&amp;quot; energy into splitting off a glucose molecule, then recoups the investment by metabolizing the glucose.) It's also possible to depolymerize cellulose at high temperature and pressure using nothing more than water and acid, but that process is energy-intensive. It ''might'' be possible to do it with a solar-heated reactor.&lt;br /&gt;
&lt;br /&gt;
'''What the “p” in pH stands for:'''&lt;br /&gt;
&lt;br /&gt;
“p” shows up in pH, pK&amp;lt;sub&amp;gt;a&amp;lt;/sub&amp;gt;, pK&amp;lt;sub&amp;gt;b&amp;lt;/sub&amp;gt;, and other things related to the concentration of H+ ions and OH- ions. The meaning of the &amp;quot;p&amp;quot; in &amp;quot;pH&amp;quot; has been the subject of much dispute. It is sometimes referred to as &amp;quot;power of Hydrogen&amp;quot;, perhaps related to the fact that pH is a logarithmic scale, and the logarithm is the inverse of the exponented function and, in all three languages that pH was first published in, the word for &amp;quot;potency&amp;quot; is used for exponents. The term pH was introduced by {{w|Søren Peter Lauritz Sørensen|Søren Peter Lauritz Sørensen}}, who did not publish his results in English, and more accurately translates as &amp;quot;hydric exponent&amp;quot;. The letter p could stand for, in the languages in which Sørensen published: the French 'puissance', German Potenz, or Danish potens, all referring to the concept of the &amp;quot;exponent&amp;quot; in exponential functions. &lt;br /&gt;
&lt;br /&gt;
'''Title Text: Hydrogen Denier'''&lt;br /&gt;
&lt;br /&gt;
In the title text, Randall claims to be an H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; denier by refusing to consider loose protons to be hydrogen atoms, and as such, the “p” stands for pretend. Part of the joke is Randall's implication that this is a well-known conspiracy theory that he personally buys into (it isn't). The word &amp;quot;denier&amp;quot; is often used as shorthand for other conspiracy theories, such as a &amp;quot;climate change denier&amp;quot; or a &amp;quot;moon landing denier.&amp;quot;&lt;br /&gt;
&lt;br /&gt;
Here's a breakdown of this joke:&lt;br /&gt;
&lt;br /&gt;
* H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; is the chemical symbol for a positively-charged atom of hydrogen, the smallest atom on the Periodic Table. Since hydrogen is normally just one proton and one electron, when you take the electron away, you make it positively charged (the + sign in the superscript) and you effectively end up with just a single loose proton. So the shorthand for &amp;quot;loose proton&amp;quot; is to refer to it as an H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; ion.&lt;br /&gt;
&lt;br /&gt;
* pH is taught in high school science class to essentially measure the concentration of extra loose protons in, say, an aquarium. (Different fish prefer slightly different pH levels/alkalinity.) As mentioned earlier, you can interpret the term &amp;quot;pH&amp;quot; to be referring to the &amp;quot;p&amp;quot; of &amp;quot;H&amp;quot; -- the power/potency of H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; ions.&lt;br /&gt;
&lt;br /&gt;
(Note that in reality, lone H+ ions do not exist in water, and instead they glom onto H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O molecules to form H&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;O&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; and H&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt;O&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt;/(H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O--H--OH&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;)&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; due to intermolecular hydrogen bonding. If you don't know what these chemical symbols mean, don't worry about it.)&lt;br /&gt;
&lt;br /&gt;
But as an H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; denier, Randall doesn't consider loose protons to be hydrogen atoms. He has a purist's view of hydrogen, that it is just &amp;quot;pretending&amp;quot; to be hydrogen as soon as it loses an electron. As a denier, he interprets the term &amp;quot;pH&amp;quot; as referring to the concentration of &amp;quot;pretend Hydrogen&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Hairbun stands behind a lectern on a podium speaking into a microphone on the lectern. A Cueball like guy stands to the left and another Cueball like guy and Megan stand to the right. There is a large sign hanging in the background along with some ornaments.]&lt;br /&gt;
:Sign: Grand Opening&lt;br /&gt;
:Hairbun: Our lab will be working on chemistry's top unsolved problems: arbitrary enzyme design, protein folding, depolymerization, and, of course, the biggest one of all:&lt;br /&gt;
:Hairbun: ''Figuring out what the &amp;quot;p&amp;quot; in &amp;quot;pH&amp;quot; stands for.''&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Hairbun]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Multiple Cueballs]]&lt;br /&gt;
[[Category:Chemistry]]&lt;/div&gt;</summary>
		<author><name>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2943:_Unsolved_Chemistry_Problems&amp;diff=344464</id>
		<title>2943: Unsolved Chemistry Problems</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2943:_Unsolved_Chemistry_Problems&amp;diff=344464"/>
				<updated>2024-06-17T08:39:35Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2943&lt;br /&gt;
| date      = June 7, 2024&lt;br /&gt;
| title     = Unsolved Chemistry Problems&lt;br /&gt;
| image     = unsolved_chemistry_problems_2x.png&lt;br /&gt;
| imagesize = 361x386px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = I'm an H⁺ denier, in that I refuse to consider loose protons to be real hydrogen, so I personally believe it stands for 'pretend'.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a caffeinated biochemist - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
Every field of research has [[:Category:Incomplete explanations|unsolved problems]] considered &amp;quot;important&amp;quot; or &amp;quot;significant&amp;quot; that motivate continued research. The scientists at what is apparently the &amp;quot;grand opening&amp;quot; of their new chemistry lab list several real chemistry problems, followed by one also-unsolved-but-less-scientific problem (the p in pH) &lt;br /&gt;
&lt;br /&gt;
'''Arbitrary Enzyme Design:''' &lt;br /&gt;
&lt;br /&gt;
{{w|Enzymes}} are catalytic proteins. Enzyme catalysis is often unique in comparison with other catalysis methods as it is highly specific, or tailored to a specific reaction. As such, enzyme catalysis, besides being the basis of all biochemical processes, is becoming increasing relevant to industrial synthesis processes. As enzymes can be easily synthetically produced through recombinant gene technology, being able to design an arbitrary enzyme for any reaction would mean that effectively any reaction could be relatively easily catalyzed, revolutionizing the chemical synthesis industry.&lt;br /&gt;
&lt;br /&gt;
'''Protein Folding:'''  &lt;br /&gt;
&lt;br /&gt;
{{w|Protein|Proteins}} are large molecules that consist of chains of amino acids.  These amino acids chains become {{w|Protein Folding|folded}} in extremely complex ways into intricate 3D structures, and the way a protein is folded is of critical importance to its function.  Because of the huge importance of proteins to biological life, biologists have devoted significant attention over many decades to the problem of {{w|Protein structure prediction|protein structure prediction}}.  This refers to the ability to predict the 3D structure of a protein based on the amino acid sequence, and remains one of the most important problems in computational biology. The ability to predict protein structure purely from amino acid sequence, the so-called &amp;quot;de novo&amp;quot; prediction, is known in computational biology as an unusually difficult problem due to the complexity of amino acid chains. Known as &amp;quot;Levinthal's paradox,&amp;quot; the number of possible conformations from the backbone conformations alone is estimated to have in the ballpark of 10^300 different conformations. Despite this, protein folding occurs extremely quickly in reality. Because of this difficulty in sampling conformations, even with optimization, such as secondary structure prediction and Monte Carlo simulation, a &amp;quot;true&amp;quot; accurate simulation is extremely computationally expensive. Because of this, the most accurate solutions, such as AlphaFold, utilize a combination of homology modeling - sampling experimentally determined proteins with similar sequences to infer structural motifs and similarities - and deep learning to accurately guess protein structure. See also [[1430: Proteins]].&lt;br /&gt;
&lt;br /&gt;
'''Depolymerization:'''&lt;br /&gt;
&lt;br /&gt;
Polymers are very large molecules formed out of repeating subunits called monomers. Monomers are molecules, typically organic in nature, that can bond with at least 1 other molecule, with chains of 2 or more making long chains or networks called polymers. That process is known as polymerization. Depolymerization is breaking down polymers into the small molecules they were originally made from. This is done through a variety of processes such as using radiation, electrolysis, adding chemicals, and other means. Plastics are the best-known polymers, but cellulose, proteins, and DNA are also technically polymers. The huge number of varieties and mixtures in plastics makes recycling them a huge challenge, and there is increasing concern about plastic waste damaging the environment.&lt;br /&gt;
&lt;br /&gt;
Polymerization is usually exothermic, releasing energy as heat. To reverse this would require adding energy, in a targeted way. Simply ''destroying'' a polymer, by means of highly-reactive chemicals, heat, or radiation, doesn't generally release the monomer molecules to a significant degree; most of the reaction products are highly degraded. Most polymers are made by a process of catalysis, with the small monomer molecules interacting via a catalyst structure, often in liquid form, and the eventual product is usually solid. To reverse this would require getting the catalyst to interact in a very precise way with the solid polymer, and it's relatively difficult for the catalyst structure to get into the proper configuration with the solid tangled polymer molecules.&lt;br /&gt;
&lt;br /&gt;
Another highly-desired depolymerization process would be to convert cellulose into its component glucose molecules. That glucose could then be used for a variety of different purposes, including fermentation to alcohol to use as a fuel. Currently, when plants are grown, much of the solar energy and carbon dioxide they absorb ends up in the form of cellulose rather than as starch, sugar, protein, or other substances that we find useful. Our being able to make use of the cellulose would make farming much more energy-efficient. Some organisms are able to depolymerize cellulose by means of enzymes, but our ability to use similar processes on an industrial scale is still limited. (Those organisms use a complex multi-step biochemical process which essentially &amp;quot;invests&amp;quot; energy into splitting off a glucose molecule, then recoups the investment by metabolizing the glucose.) It's also possible to depolymerize cellulose at high temperature and pressure using nothing more than water and acid, but that process is energy-intensive. It ''might'' be possible to do it with a solar-heated reactor.&lt;br /&gt;
&lt;br /&gt;
'''What the “p” in pH stands for:'''&lt;br /&gt;
&lt;br /&gt;
“p” shows up in pH, pK&amp;lt;sub&amp;gt;a&amp;lt;/sub&amp;gt;, pK&amp;lt;sub&amp;gt;b&amp;lt;/sub&amp;gt;, and other things related to the concentration of H+ ions and OH- ions. The meaning of the &amp;quot;p&amp;quot; in &amp;quot;pH&amp;quot; has been the subject of much dispute. It is sometimes referred to as &amp;quot;power of Hydrogen&amp;quot;, perhaps related to the fact that pH is a logarithmic scale, and the logarithm is the inverse of the exponented function and, in all three languages that pH was first published in, the word for &amp;quot;potency&amp;quot; is used for exponents. The term pH was introduced by {{w|Søren Peter Lauritz Sørensen|Søren Peter Lauritz Sørensen}}, who did not publish his results in English, and more accurately translates as &amp;quot;hydric exponent&amp;quot;. The letter p could stand for, in the languages in which Sørensen published: the French 'puissance', German Potenz, or Danish potens, all referring to the concept of the &amp;quot;exponent&amp;quot; in exponential functions. &lt;br /&gt;
&lt;br /&gt;
'''Title Text: Hydrogen Denier'''&lt;br /&gt;
&lt;br /&gt;
In the title text, Randall claims to be an H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; denier by refusing to consider loose protons to be hydrogen atoms, and as such, the “p” stands for pretend. Part of the joke is Randall's implication that this is a well-known conspiracy theory that he personally buys into (it isn't). The word &amp;quot;denier&amp;quot; is often used as shorthand for other conspiracy theories, such as a &amp;quot;climate change denier&amp;quot; or a &amp;quot;moon landing denier.&amp;quot;&lt;br /&gt;
&lt;br /&gt;
Here's a breakdown of this joke:&lt;br /&gt;
&lt;br /&gt;
* H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; is the chemical symbol for a positively-charged atom of hydrogen, the smallest atom on the Periodic Table. Since hydrogen is normally just one proton and one electron, when you take the electron away, you make it positively charged (the + sign in the superscript) and you effectively end up with just a single loose proton. So the shorthand for &amp;quot;loose proton&amp;quot; is to refer to it as an H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; ion.&lt;br /&gt;
&lt;br /&gt;
* pH is taught in high school science class to essentially measure the concentration of extra loose protons in, say, an aquarium. (Different fish prefer slightly different pH levels/alkalinity.) As mentioned earlier, you can interpret the term &amp;quot;pH&amp;quot; to be referring to the &amp;quot;p&amp;quot; of &amp;quot;H&amp;quot; -- the power/potency of H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; ions.&lt;br /&gt;
&lt;br /&gt;
(Note that in reality, lone H+ ions do not exist in water, and instead they glom onto H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O molecules to form H&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;O&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; and H&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt;O&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt;/(H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O--H--OH&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;)&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; due to intermolecular hydrogen bonding. If you don't know what these chemical symbols mean, don't worry about it.)&lt;br /&gt;
&lt;br /&gt;
But as an H&amp;lt;sup&amp;gt;+&amp;lt;/sup&amp;gt; denier, Randall doesn't consider loose protons to be hydrogen atoms. He has a purist's view of hydrogen, that it is just &amp;quot;pretending&amp;quot; to be hydrogen as soon as it loses an electron. As a denier, he interprets the term &amp;quot;pH&amp;quot; as referring to the concentration of &amp;quot;pretend Hydrogen&amp;quot;.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Hairbun stands behind a lectern on a podium speaking into a microphone on the lectern. A Cueball like guy stands to the left and another Cueball like guy and Megan stand to the right. There is a large sign hanging in the background along with some ornaments.]&lt;br /&gt;
:Sign: Grand Opening&lt;br /&gt;
:Hairbun: Our lab will be working on chemistry's top unsolved problems: arbitrary enzyme design, protein folding, depolymerization, and, of course, the biggest one of all:&lt;br /&gt;
:Hairbun: ''Figuring out what the &amp;quot;p&amp;quot; in &amp;quot;pH&amp;quot; stands for.''&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Hairbun]]&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Multiple Cueballs]]&lt;br /&gt;
[[Category:Chemistry]]&lt;/div&gt;</summary>
		<author><name>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2941:_Cell_Organelles&amp;diff=343797</id>
		<title>2941: Cell Organelles</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2941:_Cell_Organelles&amp;diff=343797"/>
				<updated>2024-06-05T08:25:05Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: /* Explanation */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2941&lt;br /&gt;
| date      = June 3, 2024&lt;br /&gt;
| title     = Cell Organelles&lt;br /&gt;
| image     = cell_organelles_2x.png&lt;br /&gt;
| imagesize = 563x451px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = It's believed that Golgi was originally an independent organism who was eventually absorbed into our cells, where he began work on his Apparatus.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a GOLGI ENDOPLASMIC RETICULUM. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
This comic shows a {{w|Cell (biology)|biological cell}} diagram with a mix of real and fictional {{w|organelle}}s, giving both accurate {{w|Cell biology|cell biology}} terms and humorous ones. Actual cell components include the nucleus, mitochondria, and Golgi apparatus, while unrelated concepts come from geology, engineering, anitvirus software, and even Star Wars. Labels like &amp;quot;evil endoplasmic reticulum&amp;quot; and &amp;quot;sticky endoplasmic reticulum&amp;quot; are variations of real cellular organelles. Other labels like &amp;quot;pith,&amp;quot; &amp;quot;mantle,&amp;quot; and &amp;quot;Vitreous humor,&amp;quot; are borrowed from other types of circular cross-sectional diagrams (e.g., of fruit, planets, and eyeballs).&lt;br /&gt;
&lt;br /&gt;
The title text is a fictional backstory to the {{w|Golgi apparatus}}, an essential cell organelle involved in processing and packaging proteins. It suggests that {{w|Camillo Golgi}}, the scientist who discovered the Golgi apparatus, was originally an independent organism. This organism was supposedly absorbed into our cells, where it then started working on what is now known as the Golgi apparatus. The joke is a satirical take on {{w|Symbiogenesis|endosymbiotic theory}}, which posits that certain organelles within {{w|Eukaryote|eukaryotic}} cells, like {{w|mitochondria}} and {{w|chloroplasts}}, originated from independent symbiotic {{w|Prokaryote|prokaryotic organisms}} that were absorbed by a host {{w|germ cell}}. Golgi is drawn in the comic as a cute little alien.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Label&lt;br /&gt;
! Meaning&lt;br /&gt;
! Real?&lt;br /&gt;
! Cell organelle?&lt;br /&gt;
! Explanation&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Smooth endoplasmic reticulum}}&lt;br /&gt;
| A network of tubular membranes within the cytoplasm of the cell, involved in the transport of materials.&lt;br /&gt;
| Yes&lt;br /&gt;
| Yes&lt;br /&gt;
| A standard term for the smooth (i.e., not ribosome-covered) portion of the {{w|endoplasmic reticulum}}.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Lithosphere}}&lt;br /&gt;
| The rigid outer part of the earth, consisting of the crust and upper mantle.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Term from geology; part of the Earth's crust. Labeled cross-sectional diagrams of cells and of the layers of the Earth are commonly found in science textbooks.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|O-ring}}&lt;br /&gt;
| A mechanical gasket in the shape of a torus; used to seal connections.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Engineering term. Both the o-ring and pith are drawn connected to the inner cell membrane. Made famous in pop culture for being the root cause of the {{w|Space Shuttle Challenger disaster}}.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Pith}}&lt;br /&gt;
| The central tissue in plants, used for nutrient transport.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Botanical term. Both the pith and o-ring are drawn connected to the inner cell membrane.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Cell nucleus|Nucleus}}&lt;br /&gt;
| The central and most important part of an object, forming the basis for its activity and growth.&lt;br /&gt;
| Yes&lt;br /&gt;
| Yes&lt;br /&gt;
| The cell nucleus is an actual cell organelle which houses {{w|DNA}}.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Nucleolus}}&lt;br /&gt;
| A small dense spherical structure in the nucleus of a cell during {{w|interphase}}.&lt;br /&gt;
| Yes&lt;br /&gt;
| Yes&lt;br /&gt;
| Actual cell organelle, involved in {{w|ribosome}} production.&lt;br /&gt;
|-&lt;br /&gt;
| Nucleoloulous&lt;br /&gt;
| Not a real term.&lt;br /&gt;
| No&lt;br /&gt;
| No&lt;br /&gt;
| A humorous continuation of the terms &amp;quot;nucleus&amp;quot; and &amp;quot;nucleolus.&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Nucleon}}s&lt;br /&gt;
| Protons and neutrons in the nucleus of an atom.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| While cells contain nucleons, the depicted circles are far larger than actual nucleons.&lt;br /&gt;
|-&lt;br /&gt;
| Drain plug&lt;br /&gt;
| A stopper for a drain.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| A plumbing term, which could refer to a {{w|porosome}}. Even small, temporary damage to the integrity of the {{w|cell membrane}} puts the cell at immediate and great risk of death.&lt;br /&gt;
|-&lt;br /&gt;
| Evil endoplasmic reticulum&lt;br /&gt;
| Not a real term.&lt;br /&gt;
| No&lt;br /&gt;
| No&lt;br /&gt;
| The rough endoplasmic reticulum is covered in ribosomes; the &amp;quot;evil&amp;quot; endoplasmic reticulum in the comic is covered in twice as many, and is thus twice as rough, making it evil.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Hypoallergenic}} filling&lt;br /&gt;
| Materials that cause relatively fewer allergic reactions.&lt;br /&gt;
| Yes&lt;br /&gt;
| Technically not incorrect&lt;br /&gt;
| Consumer product term, used e.g. for pillows and mattresses. If the {{w|cytoplasm}} doesn't cause allergic reactions within the cell, it is hypoallergenic.&lt;br /&gt;
|-&lt;br /&gt;
| Weak spot&lt;br /&gt;
| A vulnerable point.&lt;br /&gt;
| Yes&lt;br /&gt;
| Conceivably&lt;br /&gt;
| {{w|Cell membrane}} surfaces do indeed vary in strength, often due to the presence of organelles such as {{w|ion channel pore}}s or {{w|porosome}}s, both of which can be leveraged by viruses to enter cells.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Mitochondria}}&lt;br /&gt;
| Organelles that generate energy for the cell.&lt;br /&gt;
| Yes&lt;br /&gt;
| Yes&lt;br /&gt;
| Actual cell organelles. Mitochondria are widely known as the &amp;quot;powerhouse of the cell,&amp;quot; a phrase originally coined in 1957 by biologist {{w|Philip Siekevitz}}[https://www.scientificamerican.com/article/powerhouse-of-the-cell/] which came to prominence online in the mid-2010s.{{acn}}&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Midichlorians}}&lt;br /&gt;
| Fictional microorganisms in the {{w|Star Wars}} universe, which confer Force sensitivity and thereby {{w|Jedi}} associated powers.&lt;br /&gt;
| No&lt;br /&gt;
| Fictional&lt;br /&gt;
| It's unclear whether {{w|George Lucas}} intended for &amp;quot;midi-chlorians&amp;quot; to be {{w|Symbiogenesis|endosymbiotic organelles}} or internal {{w|Symbiosis|symbionts}}.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Chloroplast}}s if you're lucky&lt;br /&gt;
| Organelles in plant cells responsible for {{w|photosynthesis}}.&lt;br /&gt;
| Yes&lt;br /&gt;
| Yes, but in plants and plantlike organisms&lt;br /&gt;
| Actual cell organelles, found in plant cells and those of several different lineages of non-plant microorganisms and seaweeds. The phrase &amp;quot;if you're lucky&amp;quot; alludes to the good fortune that an organism, be it plant, animal, or microbe, gains by being able to photosynthesize, getting energy from sunlight, rather than have to run around all the time chasing energy. This benefit makes chloroplasts {{w|Kleptoplasty|worth stealing}}.&lt;br /&gt;
|-&lt;br /&gt;
| Human skin&lt;br /&gt;
| The outer covering of the human body.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Skin is a [https://en.wikipedia.org/wiki/Tissue_(biology) tissue] (multicellular structure). The idea that a complex tissue can be wrapped around a single cell, as if it were a cell wall, or outer {{w|cell membrane}}, or {{w|extracellular matrix}}, is patently, and humorously, absurd.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Carbonation}}&lt;br /&gt;
| {{w|Carbon dioxide}} dissolved in a liquid.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Carbonation causes soda pop and similar liquids to bubble, fizz, foam, and {{w|effervesce}}. The little dots depicted in the comic look like carbonation bubbles.&lt;br /&gt;
|-&lt;br /&gt;
| Golgi&lt;br /&gt;
| {{w|Camillo Golgi}} (1843–1926) was an Italian biologist and {{w|pathologist}} who discovered the Golgi apparatus; known also for his works on the central nervous system.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| The real Golgi was not and is not a tiny alien being who merged with our cells, as the comic and title text imply.{{Citation needed}}&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Golgi apparatus}}&lt;br /&gt;
| A complex of {{w|vesicles}} and folded membranes involved in secretion and intracellular transport.&lt;br /&gt;
| Yes&lt;br /&gt;
| Yes&lt;br /&gt;
| Actual cell organelle, which takes {{w|polypeptide}} chains from the rough endoplasmic reticulum via transport vesicles and processes them into their protein structure before sending them (again via vesicles) to their destination such as an organelle or outside of the cell.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Norton AntiVirus}}&lt;br /&gt;
| A software product designed to protect computers from malware.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Computer viruses and biological viruses are completely different, and systems designed to counter one generally don't work for the other. Many cell types do have antiviral mechanisms, notably the {{w|CRISPR}} (Clustered Regularly Interspaced Short Palindromic Repeats) DNA sequences in prokaryotes, which resist viral (bacteriophage) infection. However, the cell shown is not prokaryotic, since it contains a nucleus.&lt;br /&gt;
|-&lt;br /&gt;
| Sticky endoplasmic reticulum&lt;br /&gt;
| Not a real term, although parts of the reticula have sticky pockets.[https://www.frontiersin.org/articles/10.3389/fcell.2023.1156152/full]&lt;br /&gt;
| No&lt;br /&gt;
| No&lt;br /&gt;
| Another humorous twist on the actual types of endoplasmic reticula.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Pleiades}}&lt;br /&gt;
| A cluster of stars in the constellation Taurus.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Even a single star is far too big to fit in a cell{{Citation needed}}. The labled cluster in the comic looks like the actual constellation, as if this were a depiction of the night sky.&lt;br /&gt;
|-&lt;br /&gt;
| Natural flavor&lt;br /&gt;
| Flavoring derived from natural sources.&lt;br /&gt;
| Yes&lt;br /&gt;
| Conceivably&lt;br /&gt;
| A common ingredient on labels, usually meaning any substance to add flavor, aroma, or both, other than synthetic chemicals which are referred to as artificial flavors.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Cellophane}}&lt;br /&gt;
| A thin, transparent sheet made of regenerated {{w|cellulose}}.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| A type of packaging material. A {{w|cell wall}} is indeed made of cellulose, though not in the form of cellophane. Also, this drawing looks more like an animal cell, which unlike plants and fungi, do not usually have a cell wall.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Rough endoplasmic reticulum}}&lt;br /&gt;
| Endoplasmic reticulum with {{w|ribosomes}} attached, involved in protein synthesis.&lt;br /&gt;
| Yes&lt;br /&gt;
| Yes&lt;br /&gt;
| Actual cell organelle. &amp;quot;Rough&amp;quot; refers to the presence of ribosomes covering its membrane, which translate {{w|messenger RNA}} into polypeptide chains. Normally the endoplasmic reticulum would wrap around the cell nucleus.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Ventricle}}&lt;br /&gt;
| A chamber of the heart that pumps blood out.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Ventricles are actually part of the body, and they are composed of many cells. Possibly a pun on {{w|vesicle}} (or {{w|vacuole}}), a small membrane-enclosed vessel, such as the transport vesicles that carry polypeptides from the rough endoplasmic reticulum to the Golgi apparatus for processing.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Mantle}} &amp;lt;!-- intentionally left linking to disambiguation page --&amp;gt;&lt;br /&gt;
| The layer of the earth between the crust and the core.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Misplaced geological term with many other meanings.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Slime}}&lt;br /&gt;
| A moist, soft, and slippery substance, or a {{w|Slime_(toy)|goopy substance sold as a toy}}.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Could refer to the slimy texture and appearance of {{w|cytoplasm}}, but not specific to cells. Slime was a frequent appearance on the Nickelodeon TV kids channel during [[Randall]]'s youth in the 90s.{{acn}}&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Vitreous humour}}&lt;br /&gt;
| The clear gel that fills the space between the lens and the retina in the eyeball.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| The vitreous humour is in the eyes' {{w|extracellular matrix}}, not inside cells.&lt;br /&gt;
|-&lt;br /&gt;
| {{w|Seed}}s&lt;br /&gt;
| Plant embryos used for reproduction.&lt;br /&gt;
| Yes&lt;br /&gt;
| No&lt;br /&gt;
| Seeds are multicellular, and sometimes contain small proportions of non-cellular tissue. Cells are found in seeds, not the other way around. Seeds would be labled on a cross-sectional diagram of a fruit, not a cell.&lt;br /&gt;
|}&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;
Cell Organelles&lt;br /&gt;
&lt;br /&gt;
[A cell is shown with the following structures and areas labeled, counter-clockwise from upper left:]&lt;br /&gt;
&lt;br /&gt;
* Smooth endoplasmic reticulum&lt;br /&gt;
* Lithosphere&lt;br /&gt;
* O-Ring&lt;br /&gt;
* Pith&lt;br /&gt;
* Nucleus&lt;br /&gt;
* Nucleolus&lt;br /&gt;
* Nucleoloulous&lt;br /&gt;
* Nucleons&lt;br /&gt;
* Drain plug&lt;br /&gt;
* Evil endoplasmic reticulum&lt;br /&gt;
* Hypoallergenic filling&lt;br /&gt;
* Weak spot&lt;br /&gt;
* Mitochondria&lt;br /&gt;
* Midichlorians&lt;br /&gt;
* Chloroplasts if you're lucky&lt;br /&gt;
* Human skin&lt;br /&gt;
* Carbonation&lt;br /&gt;
* Golgi&lt;br /&gt;
* Golgi apparatus&lt;br /&gt;
* Norton AntiVirus&lt;br /&gt;
* Sticky endoplasmic reticulum&lt;br /&gt;
* Pleiades&lt;br /&gt;
* Natural flavor&lt;br /&gt;
* Cellophane&lt;br /&gt;
* Rough endoplasmic reticulum&lt;br /&gt;
&lt;br /&gt;
[These labels are inside the cell:]&lt;br /&gt;
&lt;br /&gt;
* Ventricle&lt;br /&gt;
* Mantle&lt;br /&gt;
* Slime&lt;br /&gt;
* Vitreous humour&lt;br /&gt;
* Seeds&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Biology]]&lt;/div&gt;</summary>
		<author><name>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:1953:_The_History_of_Unicode&amp;diff=343733</id>
		<title>Talk:1953: The History of Unicode</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:1953:_The_History_of_Unicode&amp;diff=343733"/>
				<updated>2024-06-04T12:33:12Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: &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;
&lt;br /&gt;
Is it me or my laptop isn't rendering the Unicode in the title text well? My laptop uses UTF-8. Boeing-787lover 16:55, 9 February 2018 (UTC)&lt;br /&gt;
: Don't know about you, but for me the comic is currently just a massively-blown-up picture of the top left corner of the one displayed on this page. [[Special:Contributions/141.101.107.204|141.101.107.204]] 18:06, 9 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
::I'm experiencing the same top-left-corner zoom in chrome and firefox on a mac. [[Special:Contributions/162.158.63.88|162.158.63.88]] 18:11, 9 February 2018 (UTC)Sean P. O. MacCath-Moran&lt;br /&gt;
&lt;br /&gt;
:::Same here. Safari 11.0.3 on Mac. [[Special:Contributions/172.68.211.82|172.68.211.82]] 18:13, 9 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
::It would appear that [https://imgs.xkcd.com/comics/the_history_of_unicode.png the image itself] is a massively zoomed-in version. [[User:Vor0nwe|vor0nwe]] ([[User talk:Vor0nwe|talk]]) 18:17, 9 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
:::If anyone is wondering, this is how the comic looked like for a while: http://www.explainxkcd.com/wiki/index.php/File:history_of_unicode_zoom.png&lt;br /&gt;
:::It is fixed now, and so are the years in the last panel. -[[User:Asdf|Asdf]] ([[User talk:Asdf|talk]]) 18:57, 9 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
: Not just you, in the title text I only see the first two emojis, I had to read the explanation to discover what the other two are, LOL! Then again, I'm on an iPad 1, I've come to expect such things. :) [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 06:40, 13 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
Strictly speaking Unicode [nowadays] is not an encoding; UTF-8 and UTF-16 are (possible encodings of Unicode) --[[User:JakubNarebski|JakubNarebski]] ([[User talk:JakubNarebski|talk]]) 20:28, 9 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
Might just be me, but I think the last comment from Cueball might also refer to the senator thanking the Unicode committee for recognizing the impact Lobsters have on Maine? Unicode was just supposed to make it easier to talk across different devices, and not have a role in legitimizing certain industries? [[Special:Contributions/172.68.174.46|172.68.174.46]] 22:43, 9 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
Another issue that Unicode solves, perhaps more important than having single common encoding for characters (which we don't have; UTF-8 is the most popular, but UTF-16/USC-2 is also used), is the ability to write '''multilingual''' texts. --[[User:JakubNarebski|JakubNarebski]] ([[User talk:JakubNarebski|talk]]) 09:57, 10 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
Recent revision lost the explanation of twitter post signature --[[User:JakubNarebski|JakubNarebski]] ([[User talk:JakubNarebski|talk]]) 10:21, 11 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
I'm taking issue with the statement &amp;quot;Neither dispute ever quite rose to the level of a full-on shooting war but they got surprisingly close.&amp;quot; I read the full text at the provided link, and they got close to a shooting incident between fishermen on one boat and law enforcement officers. That was the full extent of any potential shooting, and that is nowhere close to a full-on shooting war as I see it! I think this point could be a little less melodramatic. If nobody raises an objection or modifies the text accordingly, I will eventually clean it up myself. [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 14:16, 11 February 2018 (UTC)👍&lt;br /&gt;
&lt;br /&gt;
:I'd still consider that surprisingly close, in context. --[[Special:Contributions/162.158.58.87|162.158.58.87]] 20:30, 12 February 2018 (UTC)&lt;br /&gt;
:: Agreed, I didn't read the article, but even from your summation I'd say &amp;quot;surprisingly close&amp;quot; is effective description. [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 06:40, 13 February 2018 (UTC)&lt;br /&gt;
:: Ok, I'll let it stand then. [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 12:29, 13 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
&amp;quot;Prior to Unicode, Unicode attempts to Unicode [...]&amp;quot; dafuq? I would change it by myself but I don't even understand what that's supposed to express. [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 09:18, 12 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
Perhaps the conflict referred to in the title text was conducted entirely by emoji, and the Unicode Consortium sent several new 'Troop' emojis to intervene. [[Special:Contributions/162.158.155.26|162.158.155.26]] 10:40, 12 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
Emotional are just evil. It was a sad, sad day when they were first allowed into Uncoded. If you can draw it with a biro, pencil, quill pen, stick of charcoal, one of those brushes that used to be used for Chinese or any other writing stick that's fine. Everyone's script goes in. But emoji are not anyone's script, they are an invention of phone manufacturers, designed for viewing on a phone rather than writing. So they can be coloured in rather than line drawing, leading to allegations of racism because the smiley glyph on the reader's phone is brown, or is not brown, or there is no smiley with a hijab (which could be worked around if we were still allowed to use punctuation and imagination for emoticons) [[Special:Contributions/162.158.38.58|162.158.38.58]] 12:57, 23 February 2020 (UTC)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
Palestine could really use those Unicode troops right about now...&lt;br /&gt;
--[[Special:Contributions/172.70.90.99|172.70.90.99]] 12:33, 4 June 2024 (UTC)&lt;/div&gt;</summary>
		<author><name>172.70.90.99</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=1406:_Universal_Converter_Box&amp;diff=343325</id>
		<title>1406: Universal Converter Box</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=1406:_Universal_Converter_Box&amp;diff=343325"/>
				<updated>2024-05-30T19:11:20Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.90.99: /* Explanation */ Last rewrite made it look like a very narrow range (&amp;quot;not only USB, but also micro-USB!&amp;quot;, yeah, not much variation there), making it back to an example of one particular fairly typical (YMMV) conversion. HDMI-to-RCA might be more exotic.&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 1406&lt;br /&gt;
| date      = August 11, 2014&lt;br /&gt;
| title     = Universal Converter Box&lt;br /&gt;
| image     = universal_converter_box.png&lt;br /&gt;
| titletext = Comes with a 50-lb sack of gender changers, and also an add-on device with a voltage selector and a zillion circular center pin DC adapter tips so you can power any of those devices from the 90s.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
Converter boxes are used to connect two or more devices which otherwise couldn't be, due to differently shaped plugs, different voltages, or different communication protocols.&lt;br /&gt;
&lt;br /&gt;
Converter boxes or cables are commonly found for several plugs at the top of the list – such as from USB to micro-USB. As this is supposed to be a Universal Converter Box, many connections exist.&lt;br /&gt;
&lt;br /&gt;
The humor from this comic comes from the sheer number of [[927: Standards|different standards]] that all claim to be the universal way to connect two devices, in their target market, as well as the progressively ridiculous conversions that this box is capable of doing, for example, converting audio from a 1/8&amp;amp;nbsp;inch / 3.5&amp;amp;nbsp;mm headphone jack into a variety of fuel suitable for running your car.&lt;br /&gt;
&lt;br /&gt;
A connector is capable of making a connection to another connector only if the connectors are of the same style and the opposite gender (&amp;quot;male&amp;quot; connector is plug, &amp;quot;female&amp;quot; connector is socket), except for rare &amp;quot;genderless&amp;quot; connectors, such as the token ring mentioned above. Gender changers are devices with two connectors of the same gender. The &amp;quot;circular center pin DC adapter tips&amp;quot; in the title text are barrel jack power plugs. There are a large number of these style connectors, and many of these devices look the same, leading to frustration.&lt;br /&gt;
&lt;br /&gt;
===Different connectors===&lt;br /&gt;
The plugs are numbered from top to bottom and incremented for every wire coming directly from the converter box.&lt;br /&gt;
&lt;br /&gt;
====Left side====&lt;br /&gt;
#{{w|VGA connector|VGA}} (Video Graphics Array): This a video connector (standard is blue) that connects computers and monitors or projectors. It has fifteen pins in a D-shell.&lt;br /&gt;
#{{w|Digital Visual Interface|DVI}} (Digital Visual Interface): This is a video connector (standard is white) that uses a D-shell with flat pins. DVI is only partially compatible with VGA ports, itself being designed as a &amp;quot;universal&amp;quot; connection standard via its sub-types of DVI-D (digital-only), DVI-I (digital+analog), and the incredibly-rare DVI-A (analog-only).&lt;br /&gt;
#{{w|HDMI}} (High Definition Multimedia Interface): This is an audio-video connector that supports high-definition video and audio. It is largely backward-compatible with DVI-D but does not support analog connections from DVI-I or DVI-A.&lt;br /&gt;
#{{w|Thunderbolt (interface)|Thunderbolt}}: Thunderbolt can transfer both video signals to a monitor, and audio signals to speakers, and send and receive data at the same time, over the same port.&lt;br /&gt;
#{{w|IEEE 1394|Firewire}} (IEEE 1394): A bidirectional data transfer connector, similar to USB, Firewire is used for networking computers, and connecting audio/video equipment to computers.&lt;br /&gt;
#{{w|Component video|Component}} and {{w|RCA connector|RCA}}: Both component video and RCA are ways of transmitting video and audio signals. RCA is the name of the connector type. RCA uses one plug per audio channel (e.g. left and right). RCA (composite) uses one plug for video whereas the component uses three: Y (luma), Pb (Blue - Y), and Pr (Red - Y).&lt;br /&gt;
#{{w|Phone connector (audio)|1/8&amp;quot; audio/video}} (3.5&amp;amp;nbsp;mm phone connector): Best known as a headphone plug, but also used for other audio equipment and some video equipment.&lt;br /&gt;
#{{w|Parallel port}}: A port that used to be used to connect printers to PCs.&lt;br /&gt;
#{{w|S-Video (analog video standard)|S-video}}: A video with the video signal split in Y (luma) and C (chroma).&lt;br /&gt;
#{{w|In-flight entertainment#History|Airline pneumatic tube audio}}: The seat would contain the loudspeaker, and the headphone connected to this unit with a pneumatic tube to conduct the sound.&lt;br /&gt;
#{{w|PS/2 port|PS/2}}, PS/3 and PS/4: The PS/2 connector was used for mouse and keyboard connections in older computers; USB has superseded it. There are no PS/3 or PS/4 connectors. This is a play on the {{w|PlayStation}} line of video game consoles, which have recently seen their second, third, and fourth generations abbreviated to PS2, PS3, and PS4.&lt;br /&gt;
#{{w|NEMA connector|120V AC}}: This style of plug is used for domestic power outlets in the US, Canada, Mexico, Japan, and some other parts of the Americas. The pin marked &amp;quot;removable&amp;quot; is the ground pin. Not every device requires a ground pin, and some older power sockets do not have a hole for it.&lt;br /&gt;
#{{w|Floppy disk|Floppy}}, {{w|Parallel ATA|IDE}}, {{w|Hard disk drive|2.5&amp;quot;}}, {{w|SCSI connector|SCSI}}: These are {{w|Insulation-displacement connector|IDC connectors}} for connecting to media drives to processors using different numbers of pins, and hence different widths of {{w|Ribbon cable|cable}}. Despite this similarity, real plugs would not work with break-away parts as the pinout has no similarities and the connectors are keyed differently.&lt;br /&gt;
&lt;br /&gt;
====Right side====&lt;br /&gt;
#{{w|USB#Connectors and plugs|USB}}: Also known as USB-A. USBs are used for connecting various devices to computers, each other, and to power supplies and chargers. The USB standard has multiple connectors. Some of the others are below.&lt;br /&gt;
#USB (weird other end): Also known as USB-B.&lt;br /&gt;
#mini-USB/micro USB: Alternate smaller connections for USB communication.&lt;br /&gt;
#macro USB: Does not actually exist; a joke about a larger version of USB.&lt;br /&gt;
#{{w|F connector}}: A type of coaxial plug used for various television signals and cable modems.&lt;br /&gt;
#{{w|Optical fiber connector|Fiber}}: Optical fiber cables are used for various data transmission purposes and are often connected to devices with only a connector on the device, and none on the cable.&lt;br /&gt;
#{{w|Registered jack#RJ11, RJ14, RJ25 wiring|RJ11}}/{{w|Ethernet over twisted pair|Ethernet}}: Ethernet connections, which use a {{w|TIA/EIA-568|TIA/EIA-568 connector}} (often mistakenly called RJ45 because of its visual similarity), are the most common fixed wire connection for computer networking. The RJ11 connector is used for land-line telephones.&lt;br /&gt;
#{{w|Token ring}}: The token ring was a late-80s competitor to Ethernet for fixed-wire network connections. Its connectors were large and boxy but were unique in that they were genderless.&lt;br /&gt;
#{{w|MagSafe}}: Magnetically-attached power connectors used on Apple devices. The original MagSafe (introduced in 2006) was later replaced by MagSafe 2 (introduced in 2012); both come in &amp;quot;L&amp;quot; and &amp;quot;T&amp;quot; shapes as shown here for MagSafe and MagSafe 2, respectively, but are incompatible. MagSafe 3 did not exist when the comic was released but was introduced in 2021 with a similar shape to MagSafe 2. The MagSafe 3 charger in the comic appears to resemble the Apple Watch charger, interestingly. In October 2020, Apple introduced MagSafe for the iPhone 12 models. While not called &amp;quot;MagSafe 3&amp;quot; by Apple, it resembles the round shape shown here. Also, the MagSafe 4 &amp;quot;connector&amp;quot; appears to be broken; this is likely a joke about the {{w|MagSafe_(laptop_power_connector)#Defects|poor quality}} of the original MagSafe 1 cables.&lt;br /&gt;
#{{w|Bluetooth#Communication and connection|Bluetooth dongle}}: A USB device that allows the converter to connect via the {{w|Bluetooth}} wireless networking standard to accessories like phones and computers for audio, general purpose file transfer, mouse and keyboard interaction and a wide variety of other uses.&lt;br /&gt;
#{{w|SCART}}: An audio/video connector mostly used in Europe; it replaced other connectors like component video, but has itself been superseded by HDMI. Like DVI-I, it, too, was intended as a &amp;quot;universal&amp;quot; connector standard by bundling multiple parallel connections into one large plug, with the end devices selecting which ones to use based on common availability.&lt;br /&gt;
#{{w|Tin can telephone|String}}: For connecting to a &amp;quot;tin can telephone&amp;quot;, an analog device for transmitting sound through a physical connection rather than electronically or via radio waves. &lt;br /&gt;
#{{w|Fuel dispenser#Nozzles|Fuel nozzle}}, with a switch to choose between different {{w|octane rating}}s and {{w|diesel fuel}}: Dispensers for fossil fuels used to power internal combustion engines. Presumably, this would be the gasoline/petrol tip [see trivia].&lt;br /&gt;
&lt;br /&gt;
===Trivia===&lt;br /&gt;
For some interfaces, such as USB, the female side is standard to the device while the male side is standard to the cable. For other interfaces, such as the RS-232 serial port, the conventions vary or there is no convention.&lt;br /&gt;
&lt;br /&gt;
The &amp;quot;universal&amp;quot; connector here doesn't support the proper RS-232, with the closest surrogate available being RJ-11. The other nearest analog would be the parallel port, available in Centronix and D-25-pin connectors.&lt;br /&gt;
&lt;br /&gt;
The SCSI connectors have been available as the &amp;quot;internal&amp;quot; connectors (see the &amp;quot;break-away&amp;quot; above) of 2 different widths, Centronix, 2 widths of the mini-D connectors with the easily bendable pins, 3 widths of the more reliable pin-less mini-connectors, and high-speed serial.&lt;br /&gt;
&lt;br /&gt;
Not only is there gender and connector type but there are also different standards on what data/power is connected on each pin of the connector. Building a working connection often involved getting 3 or 4 adapters connected in a sequence to produce the right connector, gender, and pin-out.&lt;br /&gt;
&lt;br /&gt;
Barrel jack power plugs were developed in the 1980s. The &amp;quot;barrel&amp;quot; has an inner diameter an outer diameter, and different style pins.&lt;br /&gt;
&lt;br /&gt;
A D-shell is a trapezoidal metal skirt that protects the pins, prevents the connector from being plugged in the wrong way, and makes the physical connection more secure.&lt;br /&gt;
&lt;br /&gt;
A VGA was developed in 1987, and new versions have been developed since then.&lt;br /&gt;
&lt;br /&gt;
DVI can be configured to support multiple modes such as DVI-D (digital only), DVI-A (analog only), or DVI-I (digital and analog).&lt;br /&gt;
&lt;br /&gt;
HDMI has slowly been replacing DVI and VGA ports on newer devices due to the simplicity the smaller footprint and overall dimensions.&lt;br /&gt;
&lt;br /&gt;
Thunderbolt is far faster than almost any connector for transferring data. However, the limited adoption by manufacturers, the higher costs of the hardware, and the security concerns inherent to the interface have limited the adoption by consumers.&lt;br /&gt;
&lt;br /&gt;
Because Firewire is designed to allow {{w|backplane}} access and {{w|direct memory access}} (DMA) to devices, there are additional conversion and security issues with it.&lt;br /&gt;
&lt;br /&gt;
The phone connector diameter of 1/8&amp;quot; is only an approximation using {{w|Imperial units}}. The standard actually specifies a size in the {{w|Metric system}} of 3.5&amp;amp;nbsp;mm. The video plug has 3 contacts (Tip, Ring, and Sleeve) and the audio has 4 contacts (Tip, Ring, Ring and Sleeve).&lt;br /&gt;
&lt;br /&gt;
While no longer common in homes or offices, parallel connections are still used in some {{w|embedded system}}s.&lt;br /&gt;
&lt;br /&gt;
Airline pneumatic tube audio was used by in-flight entertainment systems manufactured from 1963 until 1979.&lt;br /&gt;
&lt;br /&gt;
Note that while AC adapters are necessary—and widely available—to suit sockets in other countries, this &amp;quot;universal&amp;quot; converter does not feature any other AC power plugs, but this could be accommodated using adapters.&lt;br /&gt;
&lt;br /&gt;
{{w|Cheater plug}}s exist to connect a NEMA grounding-type plug (three prongs) to a NEMA non-grounding receptacle (two slots), but the use of such an adapter can be hazardous if the grounding tab is not connected to an electrical ground. A safer alternative is to replace the outlet with a {{w|Residual-current device|Ground Fault Circuit Interrupter (GFCI)}} breaker outlet.&lt;br /&gt;
&lt;br /&gt;
The computer media drive connectors are unlike the motherboard-powering connectors from the Power Supply Unit of a PC, which may involve multiple additional 4, 6, and 8-pin 'breakout' supply cables that have this feature and specially 'keyed' pin-sheaths as well to allow forward/backward compatibility between various versions of PSU and motherboard that could be used (and power-hungry GPUs of various kinds, as well).&lt;br /&gt;
&lt;br /&gt;
Note that some embedded systems such as cash registers actually do use larger USB connectors to include 12V and/or 24V power connections. These are not, however, called &amp;quot;macro-USB&amp;quot;, and are not as large.&lt;br /&gt;
&lt;br /&gt;
Other countries often use RJ11-ended cables with locally specific adapter-ends, e.g. the BS 6312 in Britain. Broadband microfilters may make use of this difference by splitting a relevant telephone plug standard into the local non-RJ11 style of telephone plug for an &amp;quot;audio-only&amp;quot; pass-through socket and an RJ11 for the router/modem to be cabled up to for the abstracted &amp;quot;data-only&amp;quot; signal — making an adapter for this will be nearly impossible.&lt;br /&gt;
&lt;br /&gt;
There are two common systems for showing octane numbers on fuel pumps; the numbers shown (87, 91, 93) most closely map to {{w|Octane rating#Anti-Knock Index (AKI) or (R+M)/2|Anti-Knock Index}} values which is used for the North American market and many other countries, the other system used in the rest of the world is Research Octane Number. In the AKI system; 87 octane (91 RON) is regular US, 91 octane (95 RON) is regular European, 93 octane (98 RON) is premium European, and in the US both 91 and 93 are considered premium/super depending on the regulations of a particular state. Some states, such as California, forbid the sale of gasoline above 91 octane. Only very rarely could both 91 and 93 be found at the same gas station. The typical line-up is &amp;quot;regular&amp;quot; (87), &amp;quot;plus&amp;quot; (89), and &amp;quot;premium&amp;quot;/&amp;quot;super&amp;quot; (depending on the state and the fuel brand, 91, 92 or 93 octane). A standard diesel nozzle (24mm) is slightly larger in diameter than a standard petrol nozzle (21mm) so you cannot tank diesel into a petrol car but if this nozzle has the petrol nozzle diameter you are still able to tank with it into some diesel cars. Some manufacturers such as Volkswagen fit a misfueling guard and fuel filler neck cap or have redesigned the fuel filler to prevent a petrol nozzle from being used in a diesel car.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Universal converter box with wires to connectors:]&lt;br /&gt;
:VGA&lt;br /&gt;
:DVI&lt;br /&gt;
:HDMI&lt;br /&gt;
:Thunderbolt&lt;br /&gt;
:Firewire&lt;br /&gt;
:Component&lt;br /&gt;
:[sharing connectors with Component:]&lt;br /&gt;
:RCA&lt;br /&gt;
:1/8&amp;quot; Audio&lt;br /&gt;
:1/8&amp;quot; Video&lt;br /&gt;
:Parallel Port&lt;br /&gt;
:S-Video&lt;br /&gt;
:Airline Pneumatic Tube Audio&lt;br /&gt;
:PS/2/3/4&lt;br /&gt;
:120V AC&lt;br /&gt;
::[pointing to ground pin:]&lt;br /&gt;
::Removable&lt;br /&gt;
:Floppy/IDE/2.5&amp;quot;/SCSI&lt;br /&gt;
::[pointing to sections in IDC connector:]&lt;br /&gt;
::Break here&lt;br /&gt;
:USB&lt;br /&gt;
:USB (weird other end)&lt;br /&gt;
:Mini-USB&lt;br /&gt;
:Micro USB&lt;br /&gt;
:Macro USB&lt;br /&gt;
:F Connector&lt;br /&gt;
:Fiber&lt;br /&gt;
:RJ11&lt;br /&gt;
:Ethernet&lt;br /&gt;
:Token Ring&lt;br /&gt;
:MagSafe&lt;br /&gt;
:MagSafe 2&lt;br /&gt;
:MagSafe 3&lt;br /&gt;
:MagSafe 4&lt;br /&gt;
:Bluetooth Dongle&lt;br /&gt;
:SCART&lt;br /&gt;
:String (fits most cans)&lt;br /&gt;
:[Fuel nozzle with selector for:]&lt;br /&gt;
:87/91/93/Diesel&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Computers]]&lt;/div&gt;</summary>
		<author><name>172.70.90.99</name></author>	</entry>

	</feed>