Knights always tell the truth,liars always lie,and knaves alternate between truths and lies.

Suppose you ask a native,"Are you a knight,a liar,or a knave?" The native answers,and you are able to figure out what he is.

What is the native?

If he says he is a knight, he could be anything.

If he claims to be a knave, he could be a liar or a knave.

Hence he claimed to be a liar and is a knave.

Posted by Andre on 2010-06-04 18:07:22