On a strange island, inhabitants either always tell the truth or always lie. You meet two residents, Pando and Qora. Pando states, 'Both of us are liars.' What are Pando and Qora?
Pando is a liar, and Qora is a truth-teller
If Pando were a truth-teller, his statement that 'both of us are liars' would be a lie, which is a contradiction. Therefore, Pando must be a liar. Since his statement is a lie, the opposite must be true: at least one of them is a truth-teller. Since Pando is a liar, Qora must be the truth-teller.
About this riddle
Logic riddles give you a few facts and ask what must be true. List what you know, cross out what cannot be, and see what is left.
Difficulty: Hard. More like this: Logic riddles with answers or try Einstein's Logic Grid for a different kind of puzzle.
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