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Question: you are on an island inhabited by 3 types of...

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You are on an island inhabited by 3 types of people. Those who only tell the truth (knights), those who only tell lies (knaves) and those who either tell the truth or lie (spies). You come across 3 people. You know that one is a knight, one is a knave and one is a spy.

A says B is a spy

B says C is a spy

C says B is a spy

What type is each person

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