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Jub - Re. the Cannibal one, I was thinking more along the line of you'd have to ask something like "What would someone from your neighbouring village say if I asked which road took me to safety?". But I think Quantum's solution is right, because of the question within the question. If you asked the cannibal directly, "Is that the correct road to get to the village of pacifists?", he'd say "No" if it was and "Yes" if it wasn't. But if you ask him what he would say, he has to reverse that lie and tell you the truth, because if he accurately reported what he would say, he would be telling the truth. If he's the truth teller, he'd give you the same answer both to the question and the meta-question, so it makes no difference.
I think. |
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