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Puzzle of the day from perplexus.info: Drew and Mohammad come back (Difficulty: 1 of 5)
If two people are of the same type,then they are either both knights or both liars.
If they are of different types,then one is a knight and one is a liar.
Now, suppose Drew and Mohammad say the following.
Drew: We are of the same type.
Mohammad: We are of different types.