Four suspect cats—Whiskers, Paws, Shadow, and Felix—are questioned about a broken vase. Whiskers says 'Paws broke it.' Paws says 'Felix broke it.' Shadow says 'I did not break it.' Felix says 'Paws is lying.' If exactly ONE cat is telling the truth, who broke the vase?
Shadow
If Felix is telling the truth, then Paws is lying. This means Whiskers, Paws, and Shadow are all lying. Shadow lying means Shadow's claim 'I did not break it' is false, meaning Shadow broke the vase. This configuration leaves Felix as the sole 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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