A man is lost in the jungle and his tour guide was eaten by a tiger. He remembers however that before his tour guide was eaten, he told him of two tribes in the area.
One tribe, was a truth telling tribe, and they only ever told the truth. They were a good tribe.
The second tribe, was a lying tribe. They lied about everything and were headhunters. They were a bad tribe..
The man, annoyed because he was lost, stumbled accross a tribesman.. He wanted to ask for directions, but realsed that if he was a liar tribesman, he would get the wrong answer. What question could he ask the unknown tribesman, to get directions to the truth telling tribe?