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Liar or not? (Posted on 2002-11-12) Difficulty: 3 of 5
A man walks up to you and says:
"Everything I say to you is a lie."

Is he telling you the truth or is he lying?

See The Solution Submitted by Raveen    
Rating: 2.7059 (17 votes)

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Solution Everything, something and nothing | Comment 16 of 38 |
The man cannot be speaking the truth because that would make his statement a lie.
If he is lying the negative of his statement is true. The negative of 'everything' is not 'nothing', which is what makes this statement seem like a paradox. If he is lying, the truth is that 'some things he says are lies', including the statement quoted.
The man is lying.
The statement is not a paradox.
  Posted by Aparna Tulpule on 2002-11-15 21:09:34
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