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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)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): surely a paradox | Comment 5 of 38 |
(In reply to re: surely a paradox by levik)

The question is: "Is the statement 'Everything I say is a lie' a lie, or the truth?"

If the statement is the truth, it cannot be uttered because of paradox.

But if it is a lie, then we only know that the speaker can tell the truth, not that he only tells the truth. If he can choose to either lie or tell the truth, then this is just one of the occassions that he chooses to lie.

If the statement had been "I am lying," or something to that effect, then it would be a paradox, because that version excludes the middle ground.
  Posted by TomM on 2002-11-13 02:35:22

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