You are traveling by sea in your own boat, when suddenly a storm strikes! A crate of something heavy falls on top of your head and you are knocked out for several hours.
When you awake, you find yourself on a uninhabited island. As you walk, you see a sign ahead of you. Under the sign is an old, frail man. You also notice that the road splits into two near identical paths.
When you draw closer to it, you see the text:
One path leads to great riches and fame, the other leads to a lifetime of perilous struggle. The man under this sign knows which path leads where. He will either always lie or always tell the truth. You will never know which. You may ask him one question and one question only. What one question can you ask the old man so you have a sure answer of which path is the correct one?
Those of you that already know the answer because I've told you or you've heard it in the past... don't comment.