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These problems are from a very large set of questions about Liars who always lie about everything, and Knights who always tell the truth. Some questions also involve Knaves - people who strictly alternate between lying and telling the truth. (They are of course all indistinguishable from one another by outward appearance, and you must use logic to determine who's who.)
Difficulty: 2 of 5 Latest: X and Y 2
There is a land where every inhabitant is either of Type X or Type Y. One type always tells the truth, and one type always lies. You meet two inhabitants, A and B.

A:B is of Type X.
B:At least one of us is of Type Y.

Which type tells the truth, which type lies, and what are A and B?

(No Solution Yet, 1 Comments) Submitted on 2019-01-28 by Math Man   
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