Exercises 28-35 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by Smullyan [Sm78]) who can either lie or tell the truth. You encounter three people,A,B, andC. You know one of these people is a knight, one is a knave, and one is a spy. Each of the three people knows the type of person each of other two is. For each of these situations, if possible, determine whether there is a unique solution and determine who the knave, and spy are. When there is no unique solution, list all possible solutions or state that there are no solutions.
34. A says "l am not the spy,Bsays "I am not the spy, andCsays "Ais the spy."
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Discrete Mathematics and Its Applications ( 8th International Edition ) ISBN:9781260091991
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