This is one of the most famous logic problems which can be solved by using classic logic operations. You may have heard a few variations of this puzzle before (eg. 2 doors - 1 to heaven and 1 to hell) but still, it's one of the best brain teasers.
There are a few types of logic questions:

1. Indirect question: "Hello there beauty, what would your sister say, if I asked her where this road leads?" The answer is always negated.
2. Tricky question: "Excuse me lady, does a truth telling person stand on the road to the village?" The answer will be YES, if I am asking a truth teller who is standing at the road to village, or if I am asking a liar standing again on the same road. So I can go that way. A similar deduction can be made for negative answer.
3. Complicated question: "Hey you, what would you say, if I asked you ...?" A truth teller is clear, but a liar should lie. However, she is forced by the question to lie two times and thus speak the truth.