Home > Logic > Liars and Knights
| Liar Logic (Posted on 2013-04-11) |
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A and B are each either a knight or a liar. A says, "At least one of us is a liar." What are A and B?
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Submitted by Math Man
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Rating: 5.0000 (1 votes)
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Solution:
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Suppose A is a liar. Then, at least one of them is a liar, so A's statement is true. That is impossible, so A is a knight. Therefore, at least one of them is a liar, so B is a liar. A is a knight and B is a liar.
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