Liars 3
Who is the truth-teller? 1: Person A claims person B always tells the truth. 2: Person B claims person B(himself) sometimes tells the truth. 3: Person C claims person B always lies. One of them always tells the truth, one always lies, and one is ambiguous (sometimes lies or tells the truth).
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1 solution
1: Person A claims person B always tells the truth. 2: Person B claims person B(himself) sometimes tells the truth. 3: Person C claims person B always lies. One of them always tells the truth, one always lies, and one is ambiguous (sometimes lies or tells the truth): If person B is indeed ambiguous, both A and C are liars. This cannot happen, so B has to be a liar. From this, you can see C is telling the truth, and A is ambiguous. If A was telling the truth, then B would have also been the truth-teller.