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| Lying about lying; This is unsolvable | |
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| Topic Started: Nov 30 2006, 11:54 PM (661 Views) | |
| Stephen | Nov 30 2006, 11:54 PM Post #1 |
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Smarter than the Average Amoeba
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 Someone says they are lying, but they aren't. Are they lying, or telling the truth? ?:-(
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| Admin | Nov 30 2006, 11:58 PM Post #2 |
Administrator
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"I am a liar!" If the person is lying, then that statement must be false. Thus, the must not be lying, a contradiction. If the person is telling the truth, they must be lying, which is a contradiction. It is solvable, however. The solution is that it is undecidable. |
 
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| appu_xavier | Dec 1 2006, 12:53 AM Post #3 |
Poincaré Conjecture
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My Head Hurts!
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| vwilliams | Dec 1 2006, 04:04 AM Post #4 |
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Mathematician
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He is lying about not lying therefore he is lying. 
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| appu_xavier | Dec 1 2006, 04:06 AM Post #5 |
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Poincaré Conjecture
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These are fun, but they make your head hurt. |
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| Olivia | Dec 1 2006, 10:18 PM Post #6 |
 
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They are neither lying nor telling the truth. They are trying to confuse you. And they always succeed. |
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| Admin | Dec 1 2006, 10:45 PM Post #7 |
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Administrator
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Your mission is not to accept the mission. Do you accept? |
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| Michel | Dec 1 2006, 11:08 PM Post #8 |
Chipmunk
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Yes. You didn't specify which mission I was not to accept. |
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You cannot shake hands with a clenched fist. -Indira Gandhi (1917 - 1984) | |
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| Admin | Dec 1 2006, 11:12 PM Post #9 |
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Administrator
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Your mission is: not to accept this mission. Do you accept? I certainly specified the mission. |
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| appu_xavier | Dec 2 2006, 12:46 AM Post #10 |
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Poincaré Conjecture
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I rest my case. |
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| KRK | Dec 2 2006, 01:37 AM Post #11 |
Poincaré Conjecture
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There are multiple cases. One: They are lying about a previous action Therefore, they are lying. Case two, is flawed because of the prospect of the actions. Lying about lying means your telling the truth, but the lie involved flaws it. |
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| Noah | Dec 2 2006, 02:26 AM Post #12 |
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Neophyte
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Yeah, no definite answer, either way its impossible. |
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| appu_xavier | Dec 3 2006, 05:52 PM Post #13 |
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Poincaré Conjecture
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what he said. |
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| Thalia | Dec 5 2006, 09:51 PM Post #14 |
Mathematician
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It's just a case of the Lady or the Tiger, isn't it? Pretty easy to understand, but hard to answer. |
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Verba vestra intellegere non possum! | |
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| Edwardted | Dec 6 2006, 01:11 AM Post #15 |
Twin Prime Conjecture
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Lying when their not........ Its impossible. If your not lying then your not lying. If you are then you are. Thats it. |
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