The 'Winged Robot' logic puzzle: can a grandfather be exactly his son's age?
pickover · x · 2026-11-15
Math popularizer Clifford Pickover shares the 'Winged Robot Puzzle': Danielle claims her grandfather is exactly the same age as her father, a winged robot vouches she's telling the truth, and readers must figure out whether the robot could be right — a fun test of semantic reasoning, also a good prompt to try on LLMs.
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