A mysterious island with knights who always tell the truth, knaves who always lie, and spies who can be honest or dishonest at will.
On the island of knights and knaves and spies, you are approached by three men. One wears blue, one wears red, and one wears green. You know that one is a knight, one is a knave, and one is a spy.
The man in blue says, “I am not a spy.”
The man in red says, “I am a knave.”
The man in green says, “If you asked me, I would say that the man in red is the spy.”
What are the true identities of these three men?
If the man in red is in fact the spy, could the man in green be a knight? What about a knave?
The solution provided by Popular Mechanics will be given after a few people have tried or around 9 p.m., somewhere there.