In the words of “Monty Python and the Flying Circus”—now for something completely different: When I started writing this blog, I had no preconceived idea about the frequency or schedule of its postings. After a while it became clear to me that once a week was about the right frequency (since there are a few other things I do, such as trying to retain a sense of reality in the current political season). And somehow Wednesday became the day on which the week’s post goes out into the mysterious world of the...