131. The Truth-Telling Robot Dilemma
There are two doors: one that you can live if you go through, and one that you die with robots in front of them. One robot tells the truth and one lies. You get to ask one robot one question. What robot would you ask, and what question?
Added 27 April 2012
Hint: Ask a question that reveals the truth about the doors regardless of which robot you ask.
Solution:
You should ask either robot: 'If I were to ask the other robot which door leads to life, what would they say?' Then choose the opposite door.
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