Where the fandom often pretends that the writers got it wrong.
Irene: "I wrote some fanfiction where Fred Weasley survived the Battle of Hogwarts and he and George move their shop to Hogsmeade."
Benita: "That's not what happened in the books."
Irene: "Er, yeah. That is why it is FANFICTION."
Benita: "Oh, right."