Seen on Facebook today:
Werner Heisenberg, Kurt Gödel, and Noam Chomsky walk into a bar.
Heisenberg turns to the other two and says, "This is clearly a joke from the set-up, but we are uncertain if it's funny or not"
Gödel replies, "We can't prove the joke is funny from within the joke using the axioms of the joke alone."
And Chomsky says, "Of course it's funny. You're just not telling it right."