Back to the Finchley Central hypothesis
"Cheers mate" is a game whereby whenever anyone asks a question, you must reply "cheers mate" without answering the question. A British student has claimed that in order to overcome this annoying game, he added a rule that the first person to think of the "cheers mate" game would lose. Over time, the original "cheers mate" aspect was forgotten but the game that you lost when you thought about it remained.