A lone traveler seeks to visit a sage. Along his journey he arrives at a fork in the road, where one path leads to the jungle and the other leads to the sage. At the fork in the road stand two dwarfs. One of the dwarfs always says the truth, the other always lies (but you don't know who says the truth and who lies). Is it possible to find the path that goes to the sage by asking one yes/no question to either dwarf? If yes, what question? If no, why?