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  "body": "\n## Statement\n\nIf all one wants to know is whether someone is a knight or a knave, this can be tested by simply asking a question to which the answer is already known. In the film *The Enigma of Kaspar Hauser*, a character solves the puzzle of whether a man is a knight or a knave by suggesting asking the man \"whether he was a tree frog\".\n",
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