For some reason, this thread reminds me of the Werner Herzog film "The Mystery of Kaspar Hauser". (If you've never seen it, I highly recommend it).
One day, out of nowhere, Kaspar Hauser appears in a small town. He cannot speak and seems barely human. Fascinated, the town tries to civilize him. But soon they begin to treat him as a fantastic wild animal, passing him around for amusement. Inspired by a true story, Werner Herzog creates an unforgettable classic of the New German Cinema.
In one scene, a Professor of Logic tests Kaspar to see if he is retarded. The scholar poses a famous logic question regarding the city of liars and the city of truth tellers. Upon meeting a man on a road, the puzzle is to determine a question to ask the man in order to know to which city he belongs.
Kaspar comes up with a unique question, which is rejected by the Professor of Logic:
"Are you a frog?"
I wonder if some clever TFP member can emulate Kaspar for the current debate.