It's a lot like a classroom where the students have to show up every day, but there is no teacher. There is a pile of books and no one is sure of which is the right book. Some students insist on one book, while others argue just as hard for another. Fights break out over it.
Suddenly, on the last day, the teacher appears and says he's been watching everyone the whole time. He praises the ones who chose the right book and sends them off for cookies and milk.
And then he sets everyone else on fire.