God, the Devil and Bob
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Susam Pal
Jul 2, 2011, 3:58:20 AM7/2/11
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Puzzle from the last weekend: http://cotpi.com/p/10/
A person dies and meets God, the Devil and Bob in his afterlife. He
does not know which one is which. However, he knows that God always
speaks the truth, the Devil always lies and Bob speaks the truth
sometimes and sometimes he lies.
He is allowed to ask each a different yes-no question. He must deduce
the identities of the three beings with the answers he gets in order
to find a place in heaven. If he fails to do so, he is sent to hell.
How should he ask the three questions to get into heaven?
A person dies and meets God, the Devil and Bob in his afterlife. He
does not know which one is which. However, he knows that God always
speaks the truth, the Devil always lies and Bob speaks the truth
sometimes and sometimes he lies.
He is allowed to ask each a different yes-no question. He must deduce
the identities of the three beings with the answers he gets in order
to find a place in heaven. If he fails to do so, he is sent to hell.
How should he ask the three questions to get into heaven?
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