//Stein is introducing probability in stat Stein: So we have two words for this. I refer to this situation as A and B being "mutually exclusive." But the book, I believe, calls it "disjoint." But I sorta thought that's what potheads try to give you, you know? Disjoint? //Class laughs Stein: That was inappropriate. I apologize. //Laughter continues Stein: You know, on second thought, I should've told that joke. You guys like that more.