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Explain xkcd: It's 'cause you're dumb.
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💣__NOINDEX__
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__NOTOC__{{DISPLAYTITLE:explain xkcd}}
Make changes, try things out, or just have fun with the wiki here! Just leave everything above the line alone, please.
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<center>
[http://www.explainxkcd.com/wiki/index.php?title=explain_xkcd:Sandbox&action=edit&oldid=91667 clear sandbox]
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<font size=5px>''Welcome to the '''explain [[xkcd]]''' wiki!''</font><br>
------
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<span style="font size:210%;">We have an explanation for all [[List of all comics (full)|'''{{#expr:{{PAGESINCAT:All comics|R}}}}''' xkcd comics]], and only {{PAGESINCAT:Incomplete explanations|R}} ({{#expr: {{PAGESINCAT:Incomplete explanations|R}} / {{LATESTCOMIC}} * 100 round 1}}%) are incomplete. [[:Category:Incomplete explanations|Help us finish them!]]</span><!-- Note: the -1 in the calculation above has been removed (it was there to discount "comic" 404, but we've categorized it to be a comic and so has Randall.) -->
dnhsbaprsqbaacxlemstzecxonglsnth
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</center>
<table class="infobox vcard">
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<!-- Go to this explanation button --><span style="position: absolute; right:0; padding-top:1.4em; font-size: 100%;"><span class="no-link-underline">[[{{LATESTCOMIC}}|&nbsp;</span>'''Go to this explanation''']]</span>
<tr><th colspan=2 class="fn" style="text-align:center; font-size:125%; font-weight:bold; background-color:#BCD4E6;">Natasha</th></tr>
 
<tr><td colspan="2" class="{{{class|}}}" style="text-align:center; {{{headerstyle|}}}">[[File:Cueball.png|150px|alt=text]]
 
<div><center><i>Name</i></center></div></td></tr>
 
<tr class="{{{rowclass|}}}">
 
<th scope="row" style="text-align:left; line-height: 1.3em;">Born</th>
 
<td class="{{{class|}}}" style="line-height: 1.3em;">Unknown</td></tr></table>
 
  
<pre>#include <cstdio>
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=Latest comic=
int a[3]={0,0,0};
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<div style="border:1px solid grey; background:#f6f6f6; padding:1.5em;">
void acase(int b){
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{{:{{LATESTCOMIC}}}}
if(b>=0)printf("case %d:",b);
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----
}
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void dcase(int d,int m=0){
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<span style="position: absolute; left:0; padding-top:1.35em; font-size: 105%;"><span class="no-link-underline">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[[File:new topic.png|21x21px|link={{LATESTCOMIC}}#Discussion]][[{{LATESTCOMIC}}#Discussion|&nbsp; </span>'''View comic discussion''']]</span><br><br></div>
printf("\t\t\t\t");m?printf(" "):0;acase(a[0]+d);acase(a[1]+d);acase(a[2]+d);m?printf("\n"):printf("printf(\"2$\");break;\n");
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}
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== New here? ==
int main() {
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<div style="float:right; margin: 0 0 1em 1em">{{Special:ContributionScores/10/30/nosort,notools}}<div style="font-size:0.85em; width:28em; font-style:italic">[[Special:ContributionScores|Lots of people]] contribute to make this wiki a success. Many of the recent contributors above have [{{fullurl:Special:Contributions|contribs=newbie}} just joined]. You can do it too! Create your account [[Special:UserLogin/signup|here]].</div></div>
dcase(9,1);
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dcase(0);
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You can read a brief introduction about this wiki at [[explain xkcd]]. Feel free to [[Special:UserLogin/signup|create an account]] and contribute to the wiki! We need explanations for xkcd [[:Category:Incomplete explanations|comics]], [[:Category:Characters|characters]], [[What If? chapters|''What If?'' articles]], and [[:Category:xkcd|everything in between]]. If it is referenced in an [[xkcd]] comic, it should be here.
dcase(10,1);
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dcase(1);
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* If you're new to wiki editing, see the [[explain xkcd:Editor FAQ]] for a specific guidance to this wiki and the more general help on [[mw:Help:Editing pages|how to edit wiki pages]]. There's also a handy {{w|Help:Cheatsheet|wikicode cheatsheet}}.
dcase(2,1);
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dcase(3,1);
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* Discussion about the wiki itself happens at the [[explain xkcd:Community portal|Community portal]].
dcase(6,1);
+
 
dcase(7,1);
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* You can browse the comics from the [[List of all comics (full)|list of all comics]] or by navigating the category tree at [[:Category:Comics]].
dcase(11,1);
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dcase(12,1);
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* The incomplete explanations are listed [[:Category:Incomplete explanations|here]]. Feel free to help out by expanding them!
dcase(17,1);
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dcase(18);
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== Rules ==
dcase(14,1);
+
 
dcase(4);
+
Don't be a jerk!
dcase(15,1);
+
 
dcase(5);
+
There are a lot of comics that don't have set-in-stone explanations; feel free to put multiple interpretations in the wiki page for each comic.
dcase(8);
+
 
dcase(13);
+
If you want to talk about a specific comic, use its discussion page.
dcase(19);
+
 
dcase(16,1);
+
Please only submit material directly related to xkcd and, of course, only submit material that can legally be posted and freely edited. Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.
dcase(20);
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return 0;
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If you need assistance from an [[explain xkcd:Administrators|admin]], post a message to the [[explain xkcd:Community portal/Admin requests|Admin requests]] board.
}</pre>
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Pau={{#expr:3*asin(1)}}
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[[Category:Root category]]
<pre>n = 0
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for i in range((2 ** 13)):
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Recent comments: {{Special:RecentChanges|namespace=1}}
    if (i % 4 == 0 or i < 2 ** 7):
 
        n += 1
 
print(n)</pre>
 

Latest revision as of 06:19, 3 January 2026

Welcome to the explain xkcd wiki!
We have an explanation for all 3210 xkcd comics, and only 61 (1.9%) are incomplete. Help us finish them!

 Go to this explanation

Latest comic[edit]

Proof Without Content
There's also a proof without content of a conjecture without content, but it's left as an exercise for the reader.
Title text: There's also a proof without content of a conjecture without content, but it's left as an exercise for the reader.

Explanation[edit]

Ambox warning blue construction.png This is incomplete:
This page was created as an exercise for the reader. Don't remove this notice too soon. If you can fix this issue, edit the page!

This comic refers to a proofs without words, which rely on images or other geometric tools to visually demonstrate a concept without further explanation. The comic gives an example of a proof without any content at all, which proves its own existence.

This proof requires the conjecture to be stated, which could be construed as content.

The title text refers to another proof without content, that a conjecture without content could exist. This would imply a conjecture-proof pair with no content whatsoever. This could only be discussed indirectly, which is why it is mentioned and left as an exercise for the reader. Alternatively, the exercise could be forming the conjecture and proof itself if the comic is interpreted as a blank sheet of paper.

Transcript[edit]

Ambox warning green construction.png This is one of 41 incomplete transcripts:
Don't remove this notice too soon. If you can fix this issue, edit the page!


[Within a panel, two boxes stacked vertically. Each one has a label above it.]
Conjecture:
[Within the box]
It's possible to construct a convincing proof without words, pictures, or content of any kind.
[The next label]
Proof:
[The box underneath this label is empty.]
[Caption under the panel]
Proofs without words are cool, but we can go further.

comment.png  Add comment      new topic.png  Create topic (use sparingly)     refresh discuss.png  Refresh 

Discussion

Make changes, try things out, or just have fun with the wiki here! Just leave everything above the line alone, please.


This is a test. PoolloverNathan[stalk the blue seas] 20:48, 16 March 2021 (UTC)

This is not. —While False (museum | talk | contributions | logs | rights | printable version | page information | what links there | related changes | Google search | current time: 22:59) 18:38, 17 November 2022 (UTC)
A foreign student asked me to help fight against his math teacher. That was unusual. He was in that class for just a couple of weeks. The teacher's phone number was sent to me. The student asked me to spam-call the teacher. 172.71.155.55 22:58, 18 September 2023 (UTC)

here i'm just messing around in html, ignore this

furhhfghure guyrburgryhuyvfr "rvhru"

interesting way of writing quotations xd

hmmm this one of putting "<p>" in a line break will come in handy for when i want it to start at the same place than the first line

Please beware that <p> on mediawiki also disables automatic paragraph breaks, so you need a closing </p> or you'll break automatic paragraph formatting for the rest of the page. Zmatt (talk) 22:06, 31 July 2024 (UTC)

edit: da hek did that "</div>" come from An user who has no account yet (talk) 14:14, 13 October 2023 (UTC)

hi uh its hard to get here. is this a reference to undocumented feature??? hmm... this is interesting.
108.162.241.216 02:05, 23 November 2023 (UTC)

Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
Tomato soup.jpg Soup
yum yum [citation needed]

Hiuiedeixgeyceiyedhcdiedcve {{trout}}

This is the leaderboard:

Last 7 days (Top 50)

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More testing: hello ​ does​this​work (yes​it​does) This isn't a good name (talk) 22:44, 28 January 2026 (UTC)
      comment.png  Add comment

      new topic.png  View comic discussion

New here?[edit]

Last 30 days (Top 10)

Lots of people contribute to make this wiki a success. Many of the recent contributors above have just joined. You can do it too! Create your account here.

You can read a brief introduction about this wiki at explain xkcd. Feel free to create an account and contribute to the wiki! We need explanations for xkcd comics, characters, What If? articles, and everything in between. If it is referenced in an xkcd comic, it should be here.

  • The incomplete explanations are listed here. Feel free to help out by expanding them!

Rules[edit]

Don't be a jerk!

There are a lot of comics that don't have set-in-stone explanations; feel free to put multiple interpretations in the wiki page for each comic.

If you want to talk about a specific comic, use its discussion page.

Please only submit material directly related to xkcd and, of course, only submit material that can legally be posted and freely edited. Off-topic or other inappropriate content is subject to removal or modification at admin discretion, and users who repeatedly post such content will be blocked.

If you need assistance from an admin, post a message to the Admin requests board.

Recent comments:

30 January 2026

N    22:12 

Talk:3201: Proof Without Content‎‎ (13 changes | history) . . (+3,137). . [TheusafBOT‎; 81.179.199.253‎; 2600:4041:2e5:b900:6c41:5afb:89d1:f216‎; 2600:1700:2120:5880:c885:5daf:efd8:eadf‎; 104.28.199.245‎; R128‎ (2×); Barmar‎ (2×); 2001:16b8:b583:2500:4d66:4f4e:17e2:34f1‎ (2×); 199.36.252.124‎ (2×)]

     

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     16:25 

Talk:3200: Chemical Formula‎‎ (13 changes | history) . . (+3,905). . [1234231587678‎; 87.75.45.69‎; 82.132.236.133‎; 2001:638:807:507:10d4:7a7b:db7c:21ff‎; 195.65.24.115‎; User 8496351‎ (2×); Kynde‎ (2×); Dextrous Fred‎ (2×); 82.13.184.33‎ (2×)]

     

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29 January 2026

     18:58 

Talk:3200: Chemical Formula‎‎ (17 changes | history) . . (+4,193). . [Gorcq‎; 82.132.239.10‎; 81.179.199.253‎; 8.17.60.225‎; 2a12:f43:141a:9f00:a0fa:9260:7baf:8d57‎; 2a02:810d:9b99:7800:decb:cada:b418:2f1a‎; 174.94.104.215‎; 130.76.187.47‎; Commercialegg‎ (2×); 1234231587678‎ (2×); 82.13.184.33‎ (5×)]

     

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(cur | prev) . . (+227). . 8.17.60.225 (talk) (Potential 302 compound citation)

     15:42  Talk:2074: Airplanes and Spaceships‎ (diff | hist) . . (+358). . 82.71.120.214 (talk) (Mention of Patrick Moore, who has a connection to the topic of the comment.)
     15:36  Talk:3193: Sailing Rigs‎ (diff | hist) . . (+177). . Whoop whoop pull up (talk | contribs)
 m   14:30  Talk:3184: Funny Numbers‎ (diff | hist) . . (+125). . Commercialegg (talk | contribs) (Comment)
     10:53  Talk:490: Morning Routine‎ (diff | hist) . . (+120). . 176.199.209.149 (talk)
     09:20  Talk:3199: Early Arthropods‎ (diff | hist) . . (+88). . 82.13.184.33 (talk)