Me: 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.
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!
Librarians are the most dangerous magic users because they can aquire infinite knowlege
"There actually isn't a rule that says I can't cast this spell. I checked."