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Paradox: Difference between revisions
→The truth-teller & the liar riddle
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* two monsters guard a fork in the road | * two monsters guard a fork in the road | ||
** one path leads to perdition, the other to | ** one path leads to perdition, the other to salvation | ||
** one monster always lies and the other always tells the truth | ** one monster always lies and the other always tells the truth | ||
** you are permitted to ask each monster one question | ** you are permitted to ask each monster one question | ||
** what do you ask in order to learn which path to | ** what do you ask in order to learn which path is the one to salvation? | ||
click EXPAND for the solution | |||
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* If you ask each one which path to salvation the other would say, they bill both tell you the path to perdition; so choose the other for salvation | |||
** If Path A is salvation and Path B is perdition: | |||
*** then Liar Monster will say the other will say that the path to Salvation is Path B (which leads to perdition) | |||
*** while Truthful Monster will say that the Lying Monster will say the path to Salvation is Path B, as well | |||
*** therefore, Path A is the path to salvation | |||
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== List of paradoxes in other articles here == | == List of paradoxes in other articles here == | ||