Three people, A, B and C, (each one of whom is either a Liar or a Knight) are brought before a tribunal for a crime that was commited.

The court records have since been partially lost, and it is only known that A testified that C was the guilty one. The testimony of the other people is unavailable.

It is known that as the court found that only one of the people turned out to be a Knight, but that he was also the one guilty of the crime.

Who was it?

If A was a knight,then C would be guilty,and a knight,so we would have two knights.
The problem says that only one was a knight,so A is a liar.
Since A is a liar,C cannot be guilty because a liar said he was,and A cannot be guilty because A is a liar.
Therefore,B is guilty.
B is guilty.

Posted by Tim Axoy on 2003-03-20 01:46:50