There are some questions in the TF universe--questions like "Is Pyro a boy or a girl?" or "Who will be the tenth class?"--that get asked so often that they become, in a sense, unanswerable.

Then there are the questions nobody has thought to ask. Questions like, "Every time you explain something supernatural in TF2 you say the Soldier angered a magician. Who is the magician?" Questions like, "If the TF mercs went out trick or treating, what costumes would they wear?"