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Explain xkcd: It's 'cause you're dumb.
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Update Your Address
This is my four-digit PIN. It was passed down to me by my father, and someday I will pass it on to you. Unless we figure out how to update it, but that sounds complicated.
Title text: This is my four-digit PIN. It was passed down to me by my father, and someday I will pass it on to you. Unless we figure out how to update it, but that sounds complicated.


Ambox notice.png This explanation may be incomplete or incorrect: Created by someone with an OLD ADDRESS. There is no explanation. Do NOT delete this tag too soon.

In this comic, Cueball is facing several instances where entities asking or confirming his address find that the address they possess is incorrect - instead it is a former address, or of another person or entirely non-existent. In the last panel, it is revealed that this is due to the fact that nobody in his family or ancestors update addresses on time.

Inaccurate addresses may be a common problem for someone who has moved constantly in his lifetime. Alternatively, Cueball and his family do not find it important to update addresses for those particular businesses / entities.

Austria-Hungary was a European empire that existed between 1867 and 1918, dissolving during World War I. It is possible that Cueball's ancestors hail from the Austro-Hungarian Empire, though it would be even more absurd for that to be used as an address, given that the polity has not existed for almost a century.

Ash Tree Lane refers to House of Leaves, a postmodern novel from 2000 in which one of many nested plots involves a house on Ash Tree Lane that is bigger on the inside than on the outside, and in fact contains a labyrinth with a minotaur. The book, and Ash Tree Lane specifically, have previously been referenced in 472: House of Pancakes and 886: Craigslist Apartments.

The patent for PIN codes was submitted in May 1966, and the first public use of a PIN code was in 1967, when Barclays used them to process cheques at automated teller machines. It would be somewhat unusual for Cueball to an inherit both an active account and the PIN associated with it.


Ambox notice.png This transcript is incomplete. Please help editing it! Thanks.
[Cueball is standing, holding a phone.]
Voice: Do you still live at 342 River St?
Cueball: No, I moved last year.
[Cueball is standing behind a counter with Hairy, whose hands are on a keyboard.]
Hairy: Is 21 Ash Tree Lane still a good address?
Cueball: What? That's my childhood home. How is that even in your system?
[Cueball is holding a phone again.]
Voice: The address we have is 205 Second St #2.
Cueball: I... think that's where my parents lived before I was born!?
[Cueball stands behind another counter with Ponytail and a tablet.]
Ponytail: Are you still living in... "The Austro-Hungarian Empire?"
Cueball: You know what, sure.
Ponytail: Austria-Hungary dissolved in 1918.
Cueball: Well, I come from a long line of people who hate updating stuff.

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