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Home > Logic > Liars and Knights
It's unsolvable! (Posted on 2004-02-02) Difficulty: 4 of 5
My friend told me this complex story. Everyone in it is either a knight, knave, or liar (more than one person can have the same status). Knights always tell truths, liars always lie, and knaves always alternate every statement.

Everyone knew the status of everyone else except for my friend (he knew nothing at first). If anyone lied about what someone said, they didnít lie about who, when, or whether they said it; they only lied about what the person said. The story goes as follows.

Aaron and Bill were talking to me.
Aaron told me what he was.
At this point, I could tell what Aaron was.
Bill told me one thing that he wasnít.
Aaron told me that Cassie was a knight.
I then could figure out what Cassie was.
Bill told me that Cassie was a knave.
I thought about this for a minute.
I soon found that the previous thing Bill said allowed me to know for sure what the last of the three people were.

What type is everyone? The puzzle is solvable.

See The Solution Submitted by Tristan    
Rating: 4.1111 (9 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
No SubjectTerence2005-10-08 03:57:09
confusionKevin2004-09-25 23:50:48
ThoughtsRajal2004-08-10 10:58:05
re: Solution?talia2004-05-09 17:10:00
Solution?Mark Rees2004-03-30 05:49:54
This could be the solutionShane2004-03-25 13:49:33
further clarificationTristan2004-03-21 12:20:32
Solutionre: Pointing out...Galendir2004-03-21 08:26:02
SolutionSeems easy, What am I missing?Galendir2004-03-21 06:25:34
Problems noted?Gamer2004-02-21 21:35:49
re(2): SolutionBrian Wainscott2004-02-06 12:15:50
re: SolutionTristan2004-02-05 20:40:18
SolutionSolutionBrian Wainscott2004-02-05 11:04:54
re(6): Pointing out...Tristan?!?Tristan2004-02-04 18:37:31
Questionre(5): Pointing out...Tristan?!?Brian Wainscott2004-02-04 16:19:55
re(4): Pointing out...Brian Wainscott2004-02-04 13:51:20
Hints/Tipsre(3): Pointing out...SilverKnight2004-02-04 01:01:29
Hints/Tipsre(2): Pointing out...Tristan2004-02-03 19:29:50
Hints/Tipsre: Pointing out...SilverKnight2004-02-03 18:09:15
Hints/TipsPointing out...Tristan2004-02-03 18:01:11
The solution is here!...Jesse2004-02-02 19:37:45
SolutionNo Subjecte.g.2004-02-02 08:36:56
SolutionSolutionSam2004-02-02 08:25:55
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