The captain of a ship is telling you an interesting story, and then poses a question.
He says, “I have traveled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?“
REVEAL THE ANSWER
The sailors were standing at opposite ends of the ship, but facing one another.