Select one of the puzzles described in Section . of this chapter. Write down (clearly, precisely, and in your own words) the question that the puzzle raises. If there are others with whom you can have a discussion, divide into debate groups, each of which defends a different answer to the puzzle. (If you are by yourself, identify what you think is the best answer to the puzzle. What objections might someone raise to that answer? Is there a way to defend your answer against the objections?)