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Knights being Liars? (Posted on 2003-06-10) Difficulty: 4 of 5
You meet six men on a road side. The problem is that your wallet is mysteriously missing and you can't figure out if these men are truth tellers or not. So you ask a few questions and here are their answers:

Allan: "Fred stole it. Fred also hears quite well."

Barry: "Calvin is a liar. I did not steal it and I know Allan did not steal it."

Calvin: "Allan and Dwayne are both knights. Eddy stole it."

Dwayne: "Allan is a liar. I did not steal it."

Eddy: "Only 4 of us are knights. I did not steal it. I know Calvin did not steal it."

Fred: "I am deaf but read lips. Barry did not steal it."

Who stole the wallet?

P.S. You are sure that all of the men either lie or tell the truth. No one does both.

  Submitted by Jon    
Rating: 3.4615 (13 votes)
Solution: (Hide)
Next time you accuse someone of stealing your wallet, make sure to look in your pocket for holes. No one stole it, Dwayne called Allan a liar. This means that at least one of the two must be a liar. Since Calvin said both were knights, he is a liar. Therefore Eddy did not steal it. Eddy confesses to not stealing it making him a knight. We now know that Calvin did not steal it. Barry called Calvin a liar. This is true so Barry tells the truth. We now know that neither Barry or Allan stole the wallet. Fred said that Barry is innocent. This is the truth. Fred is a deaf knight. Since Allan said Fred could hear, he is a liar and lied about Fred stealing it. Dwayne said Allan is a liar which is the truth. Dwayne did not steal it then. This makes you having lost your wallet by the large hole in you trousers. Luckily, it hadn't gone all the way out of you pants yet was stuck in the lining, so you still have money to pay the lawyer you will need for the trial.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolAndre2010-06-04 18:33:52
Some ThoughtsSome Thoughts On The ProblemK Sengupta2007-10-27 05:57:02
No SubjectTerence2005-10-08 16:40:59
SolutionSolutionFederico Kereki2003-10-27 13:03:57
SolutionLawrence2003-08-24 16:03:21
SolutionSolution and inane ramblingsfwaff2003-06-12 06:54:10
re: sollution...Jonny Doe2003-06-12 06:14:41
sollution...rob2003-06-12 05:05:47
re: EliminateCharlie2003-06-11 16:53:37
EliminateBob2003-06-11 16:37:28
Some Thoughtsre: Fred??Lewis2003-06-11 07:18:14
Some ThoughtsFred??Jonny Doe2003-06-11 07:03:23
Some Thoughtsre: Perception and Realityfriedlinguini2003-06-11 03:59:46
P&R reduxgordo packard2003-06-11 00:53:40
re: Perception and RealityDJ2003-06-10 15:51:45
Perception and RealityBrian Smith2003-06-10 15:07:47
Some Thoughtsliar!DJ2003-06-10 14:14:56
hmm.Cory Taylor2003-06-10 12:28:10
Some ThoughtsI know, I know!Chris2003-06-10 12:12:27
Solutionre: solution (assuming...)friedlinguini2003-06-10 11:46:23
ErrorJonny Doe2003-06-10 10:49:53
re: Solution (whoops, done it wrong)Lewis2003-06-10 10:18:48
SolutionSolutionLewis2003-06-10 10:15:14
Solutionsolution (assuming...)Charlie2003-06-10 09:52:36
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