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The Hardest Logic Puzzle Ever - Logic Puzzle
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The Hardest Logic Puzzle Ever

description The Hardest Logic Puzzle Ever Overview

The Hardest Logic Puzzle Ever is a three-god problem formulated by philosopher George Boolos in 1996, requiring identification of gods who answer in an unknown language with yes/no responses meaning True, False, or Random.

help The Hardest Logic Puzzle Ever FAQ

Who created the Hardest Logic Puzzle Ever?

The puzzle was formulated by philosopher and logician George Boolos, who published it under the title 'The Hardest Logic Puzzle Ever' in the Harvard Review of Philosophy in 1996. Boolos was a professor at MIT and a leading figure in mathematical logic.

How many questions are you allowed in the Hardest Logic Puzzle Ever?

You are allowed to ask exactly three yes-or-no questions, each directed to a single god of your choosing. You may direct multiple questions to the same god or spread them across different gods as you see fit.

What language do the gods speak in the Hardest Logic Puzzle Ever?

The gods respond in their own language using the words 'da' and 'ja,' which mean 'yes' and 'no' — but you do not know which word corresponds to which meaning. This additional layer of uncertainty is part of what makes the puzzle so difficult.

Who are the three gods in the Hardest Logic Puzzle Ever?

The three gods are named True, False, and Random. True always speaks truthfully, False always lies, and Random answers yes or no completely randomly — as if flipping a coin. You do not initially know which god is which.

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