Hard
Unsolvable Riddles
25 XP

Grandfather Time Loop

4,567 solved 52% solve rate 48% fail rate
If you travel back in time and prevent your grandfather from meeting your grandmother, do you exist?
Only 52% solve this correctly
4,567 attempts
Earn +25 XP for solving
Quick Answer & Explanation
Grandfather paradox

The answer to this riddle is Grandfather paradox. Difficulty: Hard · Solved by 4,567 puzzle lovers.

Think carefully about the key words: Grandfather paradox
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