You meet two islanders, Liam and Maya. On this island, people are either Truth-tellers who only speak truth, or Liars who only tell lies. Liam says, 'At least one of us is a liar.' What are Liam and Maya?
Liam is a Truth-teller and Maya is a Liar.
If Liam were a Liar, his statement 'At least one of us is a liar' would be false, which would mean neither is a liar (both are Truth-tellers). But that contradicts Liam being a Liar. Thus, Liam must be a Truth-teller. Since his statement is true, at least one of them must be a liar. Because Liam is a Truth-teller, Maya must be the Liar.
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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