87 of 100: One Question

Probability Level 2

The road you are traveling on splits, with one fork heading to the City of Lies, and the other to the City of Truth, but you don't know which is which. You want to go to the City of Truth. A person who lives in one of the cities stands at the fork.

We know that

  • People who live in the City of Lies always lie.
  • People who live in the City of Truth always tell the truth.

What one question could you ask the person to determine which way to go?

Those darn liars!


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