207: What xkcd Means

Explain xkcd: It's 'cause you're dumb.
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What xkcd Means
It means shuffling quickly past nuns on the street with ketchup in your palms, pretending you're hiding stigmata.
Title text: It means shuffling quickly past nuns on the street with ketchup in your palms, pretending you're hiding stigmata.

[edit] Explanation

This comic purports to finally answer the question, "What does 'xkcd' mean?" However, instead of giving an answer as to what the letters actually mean (according to Randall, it's literally "just a word with no phonetic pronunciation"), he offers five quirky behaviors. This is reminiscent of TV commercials that ask, "What does [brand name] mean? It means [happy activity]!".

The first panel shows a driver making a right turn at a red light, a U-turn on the connecting road, and then another right turn, returning him to his original direction presumably faster than waiting for the light. Right turns at red lights and U-turns are legal in some states and at some intersections, but not always, hence this complicated maneuver is "questionably legal".

The second panel shows Cueball searching for his mobile phone by having his friend call it to locate the ringtone, only to hear a ring from inside of his dog's stomach.

In the third panel, Graham's number is a (very) large number (celebrated as the largest number ever used in a proof), and the Ackermann function is a (very) fast-growing function, thus the function's output must be insanely large. (In fact, A(g64, g64) is less than g65.)

The fourth panel shows somebody walking in a pattern based on the position of black and white tiles on the floor. This is further referenced in 245: Floor Tiles.

The title text refer to stigmata, marks corresponding to Jesus' crucifixion wounds. Devout Catholics have claimed to have spontaneously developed stigmata.

[edit] Transcript

What does xkcd mean?
[Two cars sitting at a red light at a multi-lane intersection; one of them makes a right turn, then shifts over to the left lane and makes a U-turn across the dividing line to go back the way it came. It then shifts back to the right lane and makes another right turn, continuing down the road past the traffic light. This is shown with a red arrow.]
It means saving a few seconds at a long red light via elaborate and questionably legal maneuvers.
[In an inset circle in the panel, someone is on a cell phone. In the panel itself, a second person is looking at a dog.]
It means having someone call your cell phone to figure out where it is.
Dog's stomach: Ring
[The mathematical function "A(g64, g64)=" appears in the panel. Next to the equal sign stands a mathematician, clutching his head.]
It means calling the Ackermann function with Graham's number as the arguments just to horrify mathematicians.
Mathematician: Aughhh
[An approximately 8 by 8 square of floor tiles is shown; the first, fourth and seventh across in the first, fourth and seventh rows are black and the rest are white. A guy and girl are shown next to it, walking on what is presumed to be the same pattern of floor tiles.]
It means instinctively constructing rules for which floor tiles it's okay to step on and then walking funny ever after.
[Line indicating the uppermost right black tile: Black tiles okay.]
[Line indicating tile directly below it: White tiles directly between black tiles okay.]
[Line indicating a white tile in the last column over: Not okay.]

[edit] Trivia

  • In his Google-speech, Randall said that xkcd originated as a previously unused random 4 letter string which he used, e.g., as his account name on various internet services.
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Discussion

I do the last panel ALL THE FRIGGIN' TIME. Alpha (talk) 20:07, 8 March 2013 (UTC)

Graham's Number has not had that title for several years now.... See here: http://googology.wikia.com/wiki/Graham's_number
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