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		<title>explain xkcd - User contributions [en]</title>
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		<updated>2026-05-30T19:51:40Z</updated>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2453:_Excel_Lambda&amp;diff=210791</id>
		<title>Talk:2453: Excel Lambda</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2453:_Excel_Lambda&amp;diff=210791"/>
				<updated>2021-04-22T17:20:10Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.93.15: &lt;/p&gt;
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Another ghost cueball comic! You can see it in the last panel. [[Special:Contributions/108.162.216.54|108.162.216.54]] 06:03, 22 April 2021 (UTC)&lt;br /&gt;
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==&amp;gt; Is that something that has happened before? First time noticing it. Is it just a remnant of the sketching? Of doest it mean something? [[Special:Contributions/162.158.93.213|162.158.93.213]] 13:21, 22 April 2021 (UTC)&lt;br /&gt;
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Someone needs to add an explanation of the Lambda, and possibly how Excel is implementing it. (I suppose it would immediately be useful for cutting down common re-use within a formula line, though =IF(ISERR(FIND(&amp;quot;:&amp;quot;,A1)),A1,RIGHT(A1,LEN(A1)-FIND(&amp;quot;:&amp;quot;,A1))) is a trivial repeat of the FIND, once to check, then again to do, I often need to do far more nested things, check for being a value, repeat the FIND to deal with the LEFT, etc.) But it has the smell of being effectively a Macro in this instance. Which already seems to me to be the only way to run a ''proper'' Turing Machine in an Excel column without hitting Circular Reference issues.&lt;br /&gt;
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Would it be a stretch to say that Turing's inability to prove if Cueball will stop is actually equivalent to the halting problem, except it is for Cueball and not an arbitrary Turing machine? I thought that was pretty funny. [[User:XTheBHox|xTheBHox]] ([[User talk:XTheBHox|talk]]) 11:30, 22 April 2021 (UTC)&lt;br /&gt;
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Microsoft themselves claim that the addition of LAMBDA makes Excel turing-comlpete (see here: https://techcommunity.microsoft.com/t5/excel-blog/announcing-lambda-turn-excel-formulas-into-custom-functions/ba-p/1925546). Based on this comic, I would argue that it already was... [[Special:Contributions/162.158.159.36|162.158.159.36]] 12:55, 22 April 2021 (UTC)&lt;br /&gt;
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==&amp;gt; Someone has already made Conway's game of life in excel (http://dailydoseofexcel.com/archives/2011/04/06/conways-game-of-life-simulation-in-excel) and game of life has been shown to be Turing complete. [[User:Kvarts314|Kvarts314]] ([[User talk:Kvarts314|talk]]) 13:28, 22 April 2021 (UTC)&lt;br /&gt;
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==&amp;gt; Since Excel has a way to store and do math on numbers, and also a way to 'point' to a certain cell, it is Turing-complete. A lambda function is not necessary for Turing-completeness (e.x. a turing machine does not have one.) [[Special:Contributions/162.158.255.250|162.158.255.250]] 15:14, 22 April 2021 (UTC)&lt;br /&gt;
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it should probably be mentioned that the number of excel rows is emphatically *not* infinite, so only simple turing machines could be implemented this way. [[Special:Contributions/162.158.93.15|162.158.93.15]] 17:20, 22 April 2021 (UTC)&lt;/div&gt;</summary>
		<author><name>162.158.93.15</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:1957:_2018_CVE_List&amp;diff=152669</id>
		<title>Talk:1957: 2018 CVE List</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:1957:_2018_CVE_List&amp;diff=152669"/>
				<updated>2018-02-19T07:41:58Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.93.15: &lt;/p&gt;
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&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;
[[First]] post!!!!!!!!!!!!!!!!!!!!!!!!!!! Anyway, the explanation looks like a train wreck, and I'm not sure if a rearranging it into a table or just adding bullet points to everything is better. I'm guessing that a table would be better, but I don't know how I can rearrange it. Can somebody help? [[User:Herobrine|Herobrine]] ([[User talk:Herobrine|talk]]) 06:35, 19 February 2018 (UTC)&lt;br /&gt;
: Added a table layout to the [[explain_xkcd:Sandbox|sandbox]]. Might be of some use to another editor. [[Special:Contributions/162.158.74.45|162.158.74.45]] 07:32, 19 February 2018 (UTC)&lt;br /&gt;
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Never ever have I heard anyone pronounce SQL as &amp;quot;sequel&amp;quot; - Is that a reqional dialect? [[Special:Contributions/162.158.93.15|162.158.93.15]] 07:41, 19 February 2018 (UTC)&lt;/div&gt;</summary>
		<author><name>162.158.93.15</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:1950:_Chicken_Pox_and_Name_Statistics&amp;diff=151980</id>
		<title>Talk:1950: Chicken Pox and Name Statistics</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:1950:_Chicken_Pox_and_Name_Statistics&amp;diff=151980"/>
				<updated>2018-02-07T09:06:38Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.93.15: &lt;/p&gt;
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&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;
I think Randall missed an opportunity to do another “make you feel old” joke here, perhaps something like “if your age isn’t on the chart, your doctors probably still thought chicken pox was caused by imbalanced humors or angry gods” or something. [[User:PotatoGod|PotatoGod]] ([[User talk:PotatoGod|talk]]) 15:24, 2 February 2018 (UTC)&lt;br /&gt;
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Shouldn't the vaccine note have been placed at age 23, not 28, if the vaccine was introduced in 1995? [[User:Rockcell|Rockcell]] ([[User talk:Rockcell|talk]]) 15:28, 2 February 2018 (UTC)&lt;br /&gt;
:When do children get their first smallpox vaccine? If that's around three that might be one explanation for the position of the note. Also the vaccine wasn't only used on children born after its introduction, kids that were already a few years old but never had smallpox could still have gotten their shots. [[Special:Contributions/108.162.229.220|108.162.229.220]] 15:52, 2 February 2018 (UTC)&lt;br /&gt;
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This isn't *smallpox*. Smallpox was eliminated in the middle of the 20th century, so it's weird if anyone gets it. Also: my understanding is that most people who got smallpox died before they got to be old enough to be on any of those graphs.&lt;br /&gt;
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I found the top graph very hard to interpret, so I've included my interpretation here for posterity: If you are 35 years old, then you were a young child before the vaccine was introduced and probably 100% of the people you knew as a child got chicken pox. If you are 20-25 years old, there's a 50-50 chance that you got the vaccine and, as a result, about 50% of the people you knew as a child got chicken pox. If you are 10 years old, then you more than likely got the vaccine and have a low probably of getting chicken pox. If you are under 5, you probably don't know many other kids. [[Special:Contributions/162.158.62.39|162.158.62.39]] 17:03, 2 February 2018 (UTC)&lt;br /&gt;
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: We are so used to reading graphs from left to right that this graph, with the inverse time line (current age) and the introduction of vaccines marked, seems to indicate that everyone had chicken pox after the vaccine was introduced, but that it was fairly rare before that. So this might be a stab at the antivaxx movement as well, and their use of warped statistics. [[User:Torax|Torax]] ([[User talk:Torax|talk]]) 11:36, 3 February 2018 (UTC)&lt;br /&gt;
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Wait, this has nothing to do with confusing correlation with causation, right? The assumption is simply that if most of the kids your age got chicken pox, which is likely if you have certain names, you will consider chicken pox to be normal and common, which seems like a reasonable claim. On the other hand, if the comic hadn't said that, the implication would be that people with certain names cause chicken pox, which would be confusing correlation with causation. -[[Special:Contributions/108.162.219.16|108.162.219.16]] 17:17, 2 February 2018 (UTC)&lt;br /&gt;
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:I agree, that’s how I interpreted the comic as well [[User:PotatoGod|PotatoGod]] ([[User talk:PotatoGod|talk]]) 18:15, 2 February 2018 (UTC)&lt;br /&gt;
&lt;br /&gt;
:I also agree, if anything this is doing the opposite and assuming no underlying causality between names and chickenpox likelihood, so that the people who get chickenpox at any given time should be distributed randomly amongst all names at prevalent at that time.[[Special:Contributions/162.158.78.184|162.158.78.184]] 19:06, 2 February 2018 (UTC)&lt;br /&gt;
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:Basically, what he's describing is a two-step correlation (of which only the second one seems causal to me, but this is debatable). First, your first name and its popularity in particular eras leads to an estimation of your age/year of birth. Second, your year of birth and the prevalence of chicken pox shortly after this year will influence whether you think chicken pox is normal. --[[User:IByte|IByte]] ([[User talk:IByte|talk]]) 23:14, 2 February 2018 (UTC)&lt;br /&gt;
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People with all six of those names probably think &amp;quot;Why do I have no less than six names?&amp;quot; --[[User:IByte|IByte]] ([[User talk:IByte|talk]]) 23:17, 2 February 2018 (UTC)&lt;br /&gt;
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It would be considerably weirder if we didn't have teeth. [[Special:Contributions/172.68.25.106|172.68.25.106]] 11:39, 3 February 2018 (UTC)&lt;br /&gt;
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: I disagree. [[User:Trevor|Trevor]] ([[User talk:Trevor|talk]]) 00:37, 4 February 2018 (UTC)&lt;br /&gt;
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I thought the joke was that fewer people who have a rare name get chicken pox than those with a common name, therefore people with said rare name must be resistant. --[[Special:Contributions/172.69.33.167|172.69.33.167]] 12:41, 3 February 2018 (UTC)&lt;br /&gt;
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I'm 30 and looking at my high school  yearbook there was 1 Logan, 2 Brians, and 5 Sarahs.  None of the other names appear.  That makes the 2nd graph pretty accurate. However, I managed to avoid the chicken pox, so I got the vaccine when I was 12.[[Special:Contributions/108.162.237.40|108.162.237.40]] 15:41, 3 February 2018 (UTC)&lt;br /&gt;
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There was an opportunity for 'old' names that have come back into common use, like, I dunno, 'Mabel', 'Eva', or 'Emmett', where you're likely to be either below 10 or over 70 years old. What percentage of Mabels  remember polio, for example?[[Special:Contributions/162.158.74.63|162.158.74.63]] 20:59, 5 February 2018 (UTC)&lt;br /&gt;
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== Logan ==&lt;br /&gt;
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Logan becomes less popular at age 30.  Coincidence? --[[Special:Contributions/162.158.126.10|162.158.126.10]] 19:09, 2 February 2018 (UTC)&lt;br /&gt;
: That just means that Logan started getting popular as a name about 30 years ago.  So maybe their parents grew up watching X-Men cartoons on TV in the late 1970's through the 1980's?  [[User:Nutster|Nutster]] ([[User talk:Nutster|talk]]) 20:40, 2 February 2018 (UTC)&lt;br /&gt;
:: I’m pretty sure the above was referencing the “Logan’s Run” and “Logan’s World” TV series and books, not X-men.  It was meant as a joke.[[Special:Contributions/162.158.78.16|162.158.78.16]] 04:54, 3 February 2018 (UTC)&lt;br /&gt;
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== Grammar  ==&lt;br /&gt;
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OK.  Grammar check now.  How many people actually have all six of these names?  Can't be too many of them.&lt;br /&gt;
And is it only men who have this issue?&lt;br /&gt;
:Statistically... None. So there's your unique new baby name! [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 22:42, 3 February 2018 (UTC)&lt;br /&gt;
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If you were to compare the top 1000 'male' and 'female' given (first) names in the USA, you'd see a number of cross-overs (such as Mary on the male list, Robert on the female list). [http://names.mongabay.com Most Common First Names and Last Names in the U.S.] [[User:These Are Not The Comments You Are Looking For|These Are Not The Comments You Are Looking For]] ([[User talk:These Are Not The Comments You Are Looking For|talk]]) 02:32, 4 February 2018 (UTC)&lt;br /&gt;
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Another grammar check:  I'm struggling to understand &amp;quot;fraction of kids my age&amp;quot;.  My age is 41; there are no kids my age, only adults.&lt;br /&gt;
: But those people age 41 now where kids around 40 years ago. [[User:LordHorst|LordHorst]] ([[User talk:LordHorst|talk]]) 08:20, 5 February 2018 (UTC)&lt;br /&gt;
: Isn't everybody someone's kid? Or is there a distinction between &amp;quot;kid&amp;quot; and &amp;quot;child&amp;quot; in such kind that the former addresses small humans of young age whereas the latter describes people who are descendants from someone else? I always assumed &amp;quot;kid&amp;quot; was just informal (or maybe an American English thing?). I don't know - I'm no native speaker and in German language both is &amp;quot;Kind&amp;quot; [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 11:56, 5 February 2018 (UTC)&lt;br /&gt;
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Another grammar check: the title of the graph is &amp;quot;Fraction of Kids&amp;quot; yet the y-axis intervals are percentages. [[Special:Contributions/141.101.77.152|141.101.77.152]] 08:55, 6 February 2018 (UTC)&lt;br /&gt;
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== Chickenpox Parties ==&lt;br /&gt;
&lt;br /&gt;
As a parent with five children born between 1980 and 1988 before the chickenpox vaccine was available, I recall a phenomena called ''Chickenpox Parties''. If you had a preschooler and heard about a neighbor's child who had the chickenpox, you would arrange a playdate with sick child so that your child would catch the disease young and then be ''inoculated'' against catching it later when it was believed to have worse prognosis. Apparently this is no longer in fashion. See this article [https://www.parents.com/health/vaccines/chicken-pox/chickenpox-parties/] So the joke could be rewritten,  &amp;quot;People named 'Sarah' and 'Brian' are more likely to have been invited to a chickenpox party than people named 'Logan' and 'Harper'.&amp;quot; P.S. one of my 5 is named Sarah and none are named Logan or Harper. [[User:Rtanenbaum|Rtanenbaum]] ([[User talk:Rtanenbaum|talk]]) 13:44, 4 February 2018 (UTC)&lt;br /&gt;
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== What's the new disease? ==&lt;br /&gt;
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I'm 30, and absolutely everyone I knew eventually caught chickenpox (and then I even caught shingles, as a statistically improbable teenager).  I even have a small scar/blemish from it on my torso.  The idea that it's been practically eliminated is fantastic.  What diseases do parents worry about these days? --[[Special:Contributions/172.68.141.196|172.68.141.196]] 21:32, 4 February 2018 (UTC)&lt;br /&gt;
: A.I.D.S., maybe? *wink* [[Special:Contributions/172.68.143.48|172.68.143.48]] 23:57, 4 February 2018 (UTC)&lt;br /&gt;
: Unfortunately too many parents worry about autism from vaccines, despite there being no indication of any risk what so ever. So in some areas these diseases are making a come back. [[User:Torax|Torax]] ([[User talk:Torax|talk]]) 16:12, 5 February 2018 (UTC)&lt;br /&gt;
: That's weird. I am 31 and I know litterally no one who had chickenpox. [[Special:Contributions/162.158.93.15|162.158.93.15]] 09:06, 7 February 2018 (UTC)&lt;/div&gt;</summary>
		<author><name>162.158.93.15</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=721:_Flatland&amp;diff=149038</id>
		<title>721: Flatland</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=721:_Flatland&amp;diff=149038"/>
				<updated>2017-12-11T16:23:41Z</updated>
		
		<summary type="html">&lt;p&gt;162.158.93.15: /* UniXkcd */ the wikipedia link for pwd command had been written pdw&lt;/p&gt;
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&lt;div&gt;{{comic&lt;br /&gt;
| number    = 721&lt;br /&gt;
| date      = March 31, 2010&lt;br /&gt;
| title     = Flatland&lt;br /&gt;
| image     = flatland.png&lt;br /&gt;
| titletext = Also, I apologize for the time I climbed down into your world and everyone freaked out about the lesbian orgy overseen by a priest.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|I just added the information on unixkcd from https://vimeo.com/78912850. I think I got all the commands from the javascript file, but I could be wrong. I just added the reply for several commands. These replies probably need a more detailed explanation.}}.&lt;br /&gt;
&lt;br /&gt;
This comic is a reference to the satirical novel {{w|Flatland|''Flatland: A Romance of Many Dimensions''}}, in which a society of flat shapes live in a {{w|Two-dimensional space|2D}} world. Half the book is a direct satire of {{w|Victorian era|Victorian}} society, and the other half explores the experience of discovering a new dimension, where a sphere introduces a square (named A. Square) to {{w|Three-dimensional space|3D}}. [[Cueball]] appears to have taken the place of this sphere, and the comic takes place after the square knows the third dimension exists.&lt;br /&gt;
&lt;br /&gt;
Humans will never fully be able to grasp the concept of a four spatial dimensions (at least not in the foreseeable future), but there are ways of squashing or slicing four dimensions to create partial visualizations of 4D space. {{w|Miegakure}} is a 4D game that uses cross-sections of 4D space. Cueball attempted to play it, but after having his mind blown, he gained more sympathy for A. Square, who'd had similar trouble understanding 3D. A. Square accepts his apology.&lt;br /&gt;
&lt;br /&gt;
The joke here is that Cueball was being silly and drew lines on A. Square to make him look like {{w|SpongeBob SquarePants (character)|SpongeBob}}, which did not make the square happy. Cueball apologizes again.&lt;br /&gt;
&lt;br /&gt;
The title text is a third apology for when Cueball crawled down into the second dimension. Being a stick figure, he is comprised of a circle and straight lines. In Flatland, circles are priests (Flatland's highest social level), and all women are lines; thus, to a watcher in Flatland, Cueball would look very much like a priest above many connected women, which may look like a lesbian orgy.&lt;br /&gt;
&lt;br /&gt;
==UniXkcd==&lt;br /&gt;
This comic was released on March 31, 2010 and was still up on April 1st, 2010. On {{w|April_Fools%27_Day|April Fools' Day}} [[Randall]] altered the website to mimic a {{w|Unix}} command line interface. This interface is still available on [https://uni.xkcd.com uni.xkcd.com] and the source code is available on [https://github.com/chromakode/xkcdfools GitHub].&lt;br /&gt;
The terminal lists a few available commands:&lt;br /&gt;
* &amp;lt;code&amp;gt;next&amp;lt;/code&amp;gt; shows the next comic. Shows the error &amp;quot;Time travel mode not enabled&amp;quot; on the last comic (see &amp;lt;code&amp;gt;enable time travel&amp;lt;/code&amp;gt;).&lt;br /&gt;
* &amp;lt;code&amp;gt;prev&amp;lt;/code&amp;gt; shows the previous comic.&lt;br /&gt;
* &amp;lt;code&amp;gt;first&amp;lt;/code&amp;gt; shows the first comic.&lt;br /&gt;
* &amp;lt;code&amp;gt;last&amp;lt;/code&amp;gt; shows the last comic.&lt;br /&gt;
* &amp;lt;code&amp;gt;display [number]&amp;lt;/code&amp;gt; shows the comic with the specified number.&lt;br /&gt;
* &amp;lt;code&amp;gt;random&amp;lt;/code&amp;gt; shows a random comic.&lt;br /&gt;
* &amp;lt;code&amp;gt;ls&amp;lt;/code&amp;gt; shows the content of the current directory.&lt;br /&gt;
* &amp;lt;code&amp;gt;cat [filename]&amp;lt;/code&amp;gt; shows the content of the file.&lt;br /&gt;
* &amp;lt;code&amp;gt;cd [directory]&amp;lt;/code&amp;gt; changes to the specified directory.&lt;br /&gt;
But there are several undocumented commands as well:&lt;br /&gt;
* &amp;lt;code&amp;gt;a/s/l&amp;lt;/code&amp;gt; randomly replies &amp;quot;2/AMD64/Server Rack&amp;quot;, &amp;quot;328/M/Transylvania&amp;quot;, &amp;quot;6/M/Battle School&amp;quot;, &amp;quot;48/M/The White House&amp;quot;, &amp;quot;7/F/Rapture&amp;quot;, &amp;quot;Exactly your age/A gender you're attracted to/Far far away.&amp;quot;, &amp;quot;7,831/F/Lothlórien&amp;quot; or &amp;quot;42/M/FBI Field Office&amp;quot;. [https://www.urbandictionary.com/define.php?term=a%2Fs%2Fl A/S/L] is not a unix command, but an acronym of Age/Sex/Location. &lt;br /&gt;
* &amp;lt;code&amp;gt;apt-get&amp;lt;/code&amp;gt; replies &amp;quot;This APT has Super Cow Powers.&amp;quot;. The &amp;lt;code&amp;gt;apt-get&amp;lt;/code&amp;gt; command is part of the Debian package manager {{w|Advanced_Packaging_Tool|APT}}. This reply is one of the build in Easter eggs.&lt;br /&gt;
* &amp;lt;code&amp;gt;asl&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;a/s/l&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;bash&amp;lt;/code&amp;gt; replies &amp;quot;You bash your head against the wall. It's not very effective.&amp;quot;. {{w|Bash}} is a shell for POSIX-based systems.&lt;br /&gt;
* &amp;lt;code&amp;gt;buy stuff&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;cd store&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;cat [number]/alt.txt&amp;lt;/code&amp;gt; displays the alt-text of the specified comic.&lt;br /&gt;
* &amp;lt;code&amp;gt;cat&amp;lt;/code&amp;gt; (without a filename) will show &amp;quot;You're a kitty!&amp;quot; referencing [[231: Cat Proximity]].&lt;br /&gt;
* &amp;lt;code&amp;gt;cheat&amp;lt;/code&amp;gt; promotes the [https://store.xkcd.com/ xkcd store].&lt;br /&gt;
* &amp;lt;code&amp;gt;clear&amp;lt;/code&amp;gt; clears the screen.&lt;br /&gt;
* &amp;lt;code&amp;gt;date&amp;lt;/code&amp;gt; replies &amp;quot;March 32nd&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;dir&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;ls&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;echo&amp;lt;/code&amp;gt; replies &amp;quot;Echo ... echo ... echo ...&amp;quot;. The {{w|Echo_(command)|echo}} command is used to print text to the terminal.&lt;br /&gt;
* &amp;lt;code&amp;gt;ed&amp;lt;/code&amp;gt; replies &amp;quot;You are not a diety.&amp;quot;. {{w|Ed_(text_editor)|ed}} is a very simple text editor. It is usually not considered very user friendly (see also &amp;lt;code&amp;gt;vi&amp;lt;/code&amp;gt; and &amp;lt;code&amp;gt;emacs&amp;lt;/code&amp;gt;).&lt;br /&gt;
* &amp;lt;code&amp;gt;emacs&amp;lt;/code&amp;gt; replies &amp;quot;You should really use vim.&amp;quot;. References [[378: Real Programmers]].&lt;br /&gt;
* &amp;lt;code&amp;gt;enable time travel&amp;lt;/code&amp;gt; replies &amp;quot;TARDIS error: Time Lord missing.&amp;quot;. A {{w|Doctor Who}} reference. See also the &amp;lt;code&amp;gt;next&amp;lt;/code&amp;gt; command.&lt;br /&gt;
* &amp;lt;code&amp;gt;exit&amp;lt;/code&amp;gt; will end the terminal session.&lt;br /&gt;
* &amp;lt;code&amp;gt;find kitten&amp;lt;/code&amp;gt; showed the {{w|Robotfindskitten}} game (unfortunately, the flash game is no longer available).&lt;br /&gt;
* &amp;lt;code&amp;gt;find&amp;lt;/code&amp;gt; replies &amp;quot;What do you want to find? Kitten would be nice.&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;finger&amp;lt;/code&amp;gt; replies &amp;quot;Mmmmmm...&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;fuck&amp;lt;/code&amp;gt; replies &amp;quot;I have a headache.&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;goto [any]&amp;lt;/code&amp;gt; shows comic [[292: goto]] and asks if you meant &amp;lt;code&amp;gt;display&amp;lt;/code&amp;gt; instead.&lt;br /&gt;
* &amp;lt;code&amp;gt;halp&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;help&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;hello joshua&amp;lt;/code&amp;gt; replies &amp;quot;How about a nice game of Global Thermonuclear War?&amp;quot;. A reference to the {{w|WarGames}} movie.&lt;br /&gt;
* &amp;lt;code&amp;gt;hello&amp;lt;/code&amp;gt; replies &amp;quot;Hello.&amp;quot;. There is a second reply &amp;quot;Why hello there!&amp;quot; coded, but it is never used.&lt;br /&gt;
* &amp;lt;code&amp;gt;help&amp;lt;/code&amp;gt; says &amp;quot;That would be cheating!&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;hi&amp;lt;/code&amp;gt; replies &amp;quot;Hi.&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;hint&amp;lt;/code&amp;gt; randomly replies &amp;quot;We offer some really nice polos.&amp;quot;, &amp;quot;This terminal will remain available at xkcd.com/unixkcd/&amp;quot;, &amp;quot;Use the source, Luke!&amp;quot; or &amp;quot;There are cheat codes.&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;i read the source code&amp;lt;/code&amp;gt; replies &amp;quot;&amp;lt;3&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;irc [nick]&amp;lt;/code&amp;gt; starts an {{w|IRC}} session on the xkcd channel on irc.foonetic.net.&lt;br /&gt;
* &amp;lt;code&amp;gt;kill&amp;lt;/code&amp;gt; replies &amp;quot;Terminator deployed to 1984.&amp;quot;. A reference to the {{w|The_Terminator|Terminator}} movie.&lt;br /&gt;
* &amp;lt;code&amp;gt;locate [filename]&amp;lt;/code&amp;gt; is normally used to locate a file in a directory. It will give humorous results when searching for &amp;lt;code&amp;gt;ninja&amp;lt;/code&amp;gt;, &amp;lt;code&amp;gt;keys&amp;lt;/code&amp;gt;, &amp;lt;code&amp;gt;joke&amp;lt;/code&amp;gt;, &amp;lt;code&amp;gt;problem&amp;lt;/code&amp;gt; and &amp;lt;code&amp;gt;raptor&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;logout&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;exit&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;lpr&amp;lt;/code&amp;gt; replies &amp;quot;PC LOAD LETTER&amp;quot;. {{w|Line_Printer_Daemon_protocol|lpr}} is a command to print documents. {{w|PC_LOAD_LETTER}} is a printer error.&lt;br /&gt;
* &amp;lt;code&amp;gt;make love&amp;lt;/code&amp;gt; replies &amp;quot;I put on my robe and wizard hat.&amp;quot;. &amp;lt;code&amp;gt;make love&amp;lt;/code&amp;gt; is a standard unix joke, because the reply is &amp;quot;make: don't know how to make love.&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;make me a sandwich&amp;lt;/code&amp;gt; behaves like [[149: Sandwich]].&lt;br /&gt;
* &amp;lt;code&amp;gt;man [command]&amp;lt;/code&amp;gt; show unhelpful information about the command (only &amp;lt;code&amp;gt;last&amp;lt;/code&amp;gt;, &amp;lt;code&amp;gt;help&amp;lt;/code&amp;gt;, &amp;lt;code&amp;gt;next&amp;lt;/code&amp;gt;, &amp;lt;code&amp;gt;cat&amp;lt;/code&amp;gt; or no command are support).&lt;br /&gt;
* &amp;lt;code&amp;gt;moo&amp;lt;/code&amp;gt; replies &amp;quot;moo&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;more&amp;lt;/code&amp;gt; replies &amp;quot;Oh, yes! More! More!&amp;quot;. The {{w|More_(command)|more}} command is used to paginate output.&lt;br /&gt;
* &amp;lt;code&amp;gt;nano&amp;lt;/code&amp;gt; replies &amp;quot;Seriously? Why don't you just use Notepad.exe? Or MS Paint?&amp;quot;. {{w|GNU_nano|Nano}} is another text editor for Unix systems (see &amp;lt;code&amp;gt;vi&amp;lt;/code&amp;gt; and &amp;lt;code&amp;gt;emacs&amp;lt;/code&amp;gt;).&lt;br /&gt;
* &amp;lt;code&amp;gt;ping&amp;lt;/code&amp;gt; replies &amp;quot;There is another submarine three miles ahead, bearing 225, forty fathoms down.&amp;quot;. The {{w|Ping_(networking_utility)|ping}} command used to measure round trip times to a destination. The name does indeed originate from {{w|sonar}} technology.&lt;br /&gt;
* &amp;lt;code&amp;gt;pwd&amp;lt;/code&amp;gt; replies &amp;quot;You are in a maze of twisty passages, all alike.&amp;quot;. The {{w|pwd}} command prints the current working directory (see &amp;lt;code&amp;gt;look&amp;lt;/code&amp;gt;).&lt;br /&gt;
* &amp;lt;code&amp;gt;quit&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;exit&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;reddit [number]&amp;lt;/code&amp;gt; shows the [https://www.reddit.com/ Reddit] voting bar for the specified comic (or xkcd when no number is specified).&lt;br /&gt;
* &amp;lt;code&amp;gt;rm [filename]&amp;lt;/code&amp;gt; will make it seem like you deleted the file.&lt;br /&gt;
* &amp;lt;code&amp;gt;serenity&amp;lt;/code&amp;gt; replies &amp;quot;You can't take the sky from me.&amp;quot;. This is a line from the Balad of Serenity from the {{w|Firefly_(TV_series)|Firefly}} TV series.&lt;br /&gt;
* &amp;lt;code&amp;gt;ssh&amp;lt;/code&amp;gt; replies &amp;quot;ssh, this is a library.&amp;quot;. {{w|Secure_Shell|ssh}} is the command to start a secure shell, but it also resembles the &amp;quot;{{w|Shh}}&amp;quot; sound.&lt;br /&gt;
* &amp;lt;code&amp;gt;su&amp;lt;/code&amp;gt; replies &amp;quot;God mode activated. Remember, with great power comes great ... aw, screw it, go have fun.&amp;quot;. The {{w|Su_(Unix)|su}} command is used to log in as super user, which gives you full and potentionally dangerous access to the system. &lt;br /&gt;
* &amp;lt;code&amp;gt;sudo [command]&amp;lt;/code&amp;gt; executes the command with {{w|Superuser|root}}  privileges.&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo apt-get dist-upgrade&amp;lt;/code&amp;gt; Returns &amp;quot;You are already running [OS].&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo apt-get moo&amp;lt;/code&amp;gt; replies &amp;quot;Have you mooed today?&amp;quot; (apt-get Easter egg).&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo apt-get update&amp;lt;/code&amp;gt; Refreshes the package list so the system knows which updates are available.&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo apt-get upgrade&amp;lt;/code&amp;gt; shows a link to [http://abetterbrowser.org/ A Better Browser] on Internet Explorer and Firefox (&amp;lt; v3). On all other browsers it doesn't complain.&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo make me a sandwich&amp;lt;/code&amp;gt; behave like [[149: Sandwich]].&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo poweroff&amp;lt;/code&amp;gt; will shutdown the system.&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo reboot&amp;lt;/code&amp;gt; will restart the system.&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo restart&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;sudo reboot&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;sudo shutdown&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;sudo poweroff&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;time travel&amp;lt;/code&amp;gt; displays [[630: Time Travel]].&lt;br /&gt;
* &amp;lt;code&amp;gt;top&amp;lt;/code&amp;gt; replies &amp;quot;It's up there --^&amp;quot;. The {{w|Top_(software)|top}} command shows a table of processes. Here it is taken literally.&lt;br /&gt;
* &amp;lt;code&amp;gt;uname&amp;lt;/code&amp;gt; replies &amp;quot;Illudium Q-36 Explosive Space Modulator&amp;quot;. The Illudium Q-36 Explosive Space Modulator is an explosive device created by Marvin the Martian in the {{w|Looney Tunes}} series.&lt;br /&gt;
* &amp;lt;code&amp;gt;unixkcd&amp;lt;/code&amp;gt; opens a new terminal window.&lt;br /&gt;
* &amp;lt;code&amp;gt;use the force luke&amp;lt;/code&amp;gt; replies &amp;quot;I believe you mean source.&amp;quot;. A reference to the {{w|The_Force_(Star_Wars)|Force}} in the {{w|Star Wars}} franchise.&lt;br /&gt;
* &amp;lt;code&amp;gt;use the source luke&amp;lt;/code&amp;gt; replies &amp;quot;I'm not luke, you're luke!&amp;quot;. An old programmes joke.&lt;br /&gt;
* &amp;lt;code&amp;gt;vi&amp;lt;/code&amp;gt; and &amp;lt;code&amp;gt;vi&amp;lt;/code&amp;gt; reply &amp;quot;You should really use emacs.&amp;quot;. References [[378: Real Programmers]].&lt;br /&gt;
* &amp;lt;code&amp;gt;wget [url]&amp;lt;/code&amp;gt; shows the content of the specified url. The {{w|wget}} command on unix will download the content and not show it.&lt;br /&gt;
* &amp;lt;code&amp;gt;who&amp;lt;/code&amp;gt; replies &amp;quot;Doctor Who?&amp;quot;. Another {{w|Doctor Who}} reference.&lt;br /&gt;
* &amp;lt;code&amp;gt;whoami&amp;lt;/code&amp;gt; replies &amp;quot;You are Richard Stallman.&amp;quot;. The {{w|whoami}} command lists the name of the current user.&lt;br /&gt;
* &amp;lt;code&amp;gt;write [nick]&amp;lt;/code&amp;gt; same as &amp;lt;code&amp;gt;irc&amp;lt;/code&amp;gt;.&lt;br /&gt;
* &amp;lt;code&amp;gt;xkcd&amp;lt;/code&amp;gt; replies &amp;quot;Yes?&amp;quot;.&lt;br /&gt;
* &amp;lt;code&amp;gt;xyzzy&amp;lt;/code&amp;gt; replies &amp;quot;Nothing happens.&amp;quot;. {{w|Xyzzy_(computing)|xyzzy}} is a magic word, originally used in the {{w|Colossal Cave Adventure}}.&lt;br /&gt;
* &amp;lt;code&amp;gt;your gay&amp;lt;/code&amp;gt; replies &amp;quot;Keep your hands off it!&amp;quot;.&lt;br /&gt;
There are also some other commands borrowed from a {{w|Zork}} like {{w|Text-based_game|text based adventure game}}.&lt;br /&gt;
* &amp;lt;code&amp;gt;look&amp;lt;/code&amp;gt; describes your current surroundings.&lt;br /&gt;
* &amp;lt;code&amp;gt;go [direction]&amp;lt;/code&amp;gt; moves you in the specified direction (&amp;lt;code&amp;gt;down&amp;lt;/code&amp;gt; is also supported; however, it replies a different message).&lt;br /&gt;
* &amp;lt;code&amp;gt;light lamp&amp;lt;/code&amp;gt; lights your lamp.&lt;br /&gt;
* &amp;lt;code&amp;gt;sleep [seconds]&amp;lt;/code&amp;gt; sleeps for the specified time. Without specifying, the nap is 5 seconds.&lt;br /&gt;
You will be killed by a {{w|Grue_(monster)|grue}} if you didn't light your lamp when going south.&lt;br /&gt;
Going west repeatedly will list the refrain from the song {{w|Go_West_(song)|Go west}}.&lt;br /&gt;
&lt;br /&gt;
The terminal also responds to the {{w|Konami code}} Up, Up, Down, Down, Left, Right, Left, Right, B, A. Entering this code repeatedly will transform all characters to upper case, add a gray text shadow, add an orange text shadow, shake the screen and add a background image of Richard Stallman from [[345: 1337: Part 5]].&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
There is actually a SpongeBob episode featuring a flat creature that resembles a crude drawing of SpongeBob.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Cueball encounters a square on the ground.]&lt;br /&gt;
:Cueball: Hey, A. Square. How's Flatland?&lt;br /&gt;
:Square: Still flat. What's up?&lt;br /&gt;
:Cueball: I just spent an hour playing a demo of this 4D game called Miegakure.&lt;br /&gt;
&lt;br /&gt;
:[A character in Miegakure jumps around the 4D landscape.]&lt;br /&gt;
:Trying to jump from block to block in four dimensions hurt my brain.&lt;br /&gt;
&lt;br /&gt;
:Cueball: So I apologize for giving you a hard time when you were slow to understand 3D space. I sympathize now.&lt;br /&gt;
:Square: It's okay.&lt;br /&gt;
&lt;br /&gt;
:Cueball: Also, I apologize for drawing arms, legs, and eyes on you to make you look like SpongeBob. That was out of line.&lt;br /&gt;
:Square: Yes, it was.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Math]]&lt;br /&gt;
[[Category:Video games]]&lt;br /&gt;
[[Category:Homosexuality]]&lt;br /&gt;
[[Category:Sex]]&lt;br /&gt;
[[Category:April fools' comics]]&lt;/div&gt;</summary>
		<author><name>162.158.93.15</name></author>	</entry>

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