City of Lies or Truth

 
City of Lies or Truth

Problem statement:

You are at an unmarked intersection … one way is the City of Lies and another way is the City of Truth.
 
Citizens of the City of Lies always lie.

Citizens of the City of Truth always tell the truth.
 
A citizen of one of those cities (you don’t know which) is at the intersection. What question could you ask to them to find the way to the City of Truth?

Done thinking? Click here to view the solution.

You ask “In which of those two directions do you live?”
 
A Citizen of the City of Lies will point to the City of Truth.

A Citizen of the City of Truth will point to the City of Truth.