how does the fork in the road liar and truthteller riddle work?

Dale Mccoun: You need to get to the city but lost your way and come to a fork in the road where there are 2 people/brothers. One always tells the truth, the other always lies.You don't know who is the truth teller or who is the liar.The riddle : What one question could you ask that will lead you down the right road to the city.THE ANSWER: Ask one of the two 'which way' will the other guy tell you to go.The take the opposite road! The truth teller will tell the truth that the LIAR would give you the WRONG WAY..if you asked the liar, he would tell youthe wrong way anyway.So that's the answer and why it works....Show more

Perry Deshazior: Yeah, what he said.