There are three people, Alex, Brook and Cody. One of whom is a knight, one a knave, and one a spy.
The knight always tells the truth, the knave always lies, and the spy can either lie or tell the truth.
Alex says: “Cody is a knave.”
Brook says: “Alex is a knight.”
Cody says: “I am the spy.”
Brook says: “Alex is a knight.”
Cody says: “I am the spy.”
Who is the knight, who is the knave, and who is the spy?
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