In an island peopled by Knights (who always say the truth) and Liars (who obviously always lie), two persons spoke about each other.

A said: "B would say I lie."

B said: "That is true."

Can anything be deduced as to what kind is each of them?

Since one of them will be accused of lying, they can't both be telling the truth,

Since there is an agreement by B, and a lier can't agree with a truth-teller, AND a truth-teller can't agree with a lier, that leaves as the only possible solution that they are both liers. (Where-in A lies about what B will say, and B lies by agreeing with the lie)

Posted by whome? on 2005-01-27 16:39:20