In my nightmares, ranked just below Ed McMahon’s direct participation in the Johnny Carson sex tape, is William F. Buckley discussing vivisection. That’s what he does in this 1990 Firing Line episode about animal rights that featured surgeon, Yale professor and author Dr. Sherwin Nuland (who passed away two weeks ago). The host and guest agree that animals should be used in medical experiments, though treated as “humanely” as possible. Nuland scoffs at the notion of speciesism and misnames the philosopher who popularized the concept in the 1970s, Peter Singer, as Peter “Berger.” All the while, Michael Kinsley darts around just offscreen, like an opossum with an impeccable résumé.