Werner Heisenberg, Kurt Gödel, and Noam Chomsky walk into a bar. Heisenberg says, “It’s very improbable that we three are in this bar together. It suggests that we’re in a joke, but I can’t be certain.” Gödel says, “Well, if we were outside the joke we would know, but since we’re inside it, there’s no way we can make that determination.” And Chomsky says, “Of course this is a joke, but you’re telling it wrong!”