perplexus.info :: Liars and Knights : Another trial

Another trial (Posted on 2002-05-08)

Residents A, B and C, each of whom are either a Liar or a Knight are brought to stand trial for a crime only one of them commited.

Each person accused one of the other two, but the records do not show who exactly. As it turned out, A was the only Knight of the three.

Curiously enough, if each person switched their testimony, and accused the remaining suspect (not themselves, and not who they accused originally), then B would come out to be the only Knight.

Who was the real culprit in the case?

Submitted by levik

Rating: 3.2000 (10 votes)

Solution: (Hide)

Since each person accused someone else, and since A turned out to be a Knight, his accusation was true. And therefore, he could not be guilty.
Likewise, B was not guilty, since - in the second case - if he were to testify that someone (not him) was the culprit, he would be telling the truth. Which means he didn't do it.
Leaving us with C, who must have been guilty by elimination.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Puzzle Solution	K Sengupta	2008-06-05 03:32:38
answer	K Sengupta	2008-02-14 14:52:23
Solution	Praneeth	2007-08-29 02:49:18
BAD	Charley	2005-05-20 16:54:38
Solution	narcoleptic	2002-05-08 08:09:00
since you can't accuse yourself...	Happy	2002-05-08 06:31:30
No Subject	Happy	2002-05-08 06:29:54

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