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Home > Logic > Liars and Knights
Odd people (Posted on 2005-09-12) Difficulty: 3 of 5
As everyone knows, knights tell the truth all the time, and liars lie all the time. At least, this is what evenly behaved knights and liars do.

Less known is that there are also odd knights, who on odd-numbered days lie all the time. (On even-numbered days, however, they behave evenly, and tell the truth.) Also, there are odd liars, who on odd-numbered days, tell the truth about everything, while they lie the rest of the days.

Someone said: "Today's the 3rd. Trust me, I'm telling the truth. I'm odd. I didn't lie yesterday. I'm not a knight."

At first, this seemed illogical, and I thought he couldn't be either a knight or a liar, even or odd, but after a while the solution dawned on me and I found the error in my reasoning. What is he?

See The Solution Submitted by e.g.    
Rating: 4.4444 (9 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionOdd solutionMath Man2012-06-24 21:03:13
No SubjectTerence2005-10-06 17:33:44
Some Thoughtsre: Solution (Wrong)e.g.2005-09-28 18:42:29
SolutionGoldwing2005-09-17 00:32:40
SolutionSolutionLouise2005-09-13 05:24:30
Some ThoughtsWho's the real liar?Leming2005-09-12 19:05:08
re: Lisa's pointCharlie2005-09-12 17:43:48
A cop outOld Original Oskar!2005-09-12 16:42:49
Some ThoughtsLisa's pointFederico Kereki2005-09-12 15:51:27
Some Thoughtsre(2): a solution?Old Original Oskar!2005-09-12 15:35:53
SolutionAnalysisFederico Kereki2005-09-12 15:30:19
Some Thoughtsre: a solution?Lisa2005-09-12 15:28:48
Some Thoughtsa solution?Charlie2005-09-12 14:27:26
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