What 2 questions would you ask Kent Beck?

If you had an hour to talk with Kent Beck, a proud father of eXtreme Programming, and you could only ask two questions, what would you ask?   I'll be interviewing Kent as part of my audio interview series this week. I promise to take into consideration any good questions that come up in the comments. One of the things we plan to talk about is the whole notion of "BDUF" ("Big Design Up Front") in agile projects, and we'll also touch on the column that Joel On Software wrote on this subject (and all the responses to it).   I await your inputs.