Often enough, students of classes I teach have questions to ask of the material after each session, sometimes in person, sometimes by email. In this blog, I will share both the questions (perhaps edited or streamlined) and my responses to them. The motivation is simple: it seems only fair that if I spent time answering what I thought was a useful question, then my response should be made available to all. So if you talk to me or email me, don’t be surprised if you discover your questions captured here (names withheld, of course; unless you insist).