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Riddle: A Liar and a Truth Teller

You are walking down a path when you come to two doors. Opening one of the doors will lead you to a life of prosperity and happiness, while opening the other door will lead to a life of misery and sorrow. You don't know which door leads to which life.

In front of the doors are two twin brothers who know which door leads where. One of the brothers always lies, and the other always tells the truth. You don't know which brother is the liar and which is the truth-teller.

You are allowed to ask one single question to one of the brothers (not both) to figure out which door to open.

What question should you ask?

You need to ask a question that will give you the same answer no matter which brother you ask.

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