Do Drug Dealers Still Live with Their Moms?                               The two previous chapters were built around a pair of admittedly freakish questions: What do schoolteachers and sumo wrestlers have in common? and How is the Ku Klux Klan like a group of real-estate agents? But if you ask enough questions, strange as they seem at the time, you may eventually learn something worthwhile. The first trick of asking questions is to determine if your question is a good one. Just because a question has never been asked does not make it good. Smart people have been asking questions for quite a few centuries now, so many of the questions that havent been asked are bound to yield uninteresting answers. But if you can question something that people really care about and find an answer that may surprise them-that is, if you can over- turn the conventional wisdom-then you may have some luck. It was John Kenneth Galbraith, the hyperliterate economic sage, who coined the phrase "conventional wisdom." He did not consider it a compliment. "We associate truth with convenience," he wrote,