Me: I need a library card, but I just moved so I don’t have an ID with my address or any mail with it.
Librarian: -slides me a blank library postcard- Write your address on this like it would be mailed to you.
Me: Sure?
Librarian: -takes it back- Great! Now we have mail with your address on it!
Me: …does it really work that way?
Librarian: the rules don’t say it DOESN’T work that way. Here’s your new library card!