There was a trial in a land where every inhabitant is either a knight, a liar, or a knave. There were three suspects, A, B, and C.
A:I am a knight.
B:I am a liar.
C:I am a knave.
A:No knaves are guilty.
B:A is a knight.
C:At most one of us is guilty.
What are A, B, and C, and who is guilty?
From the second clue, it is clear that B is a Knave and his second statement is true, making A a Knight, which absolves B of any guilt. C cannot be a Knight. Thus, C's second statement is false, which means that two persons are guilty  A & C. If C is guilty, he cannot be a Knave. So:
SolutionA = Knight
B = Knave
C = Liar
A & C are guilty

Posted by hoodat
on 20110203 20:09:31 