Here's a permanent public archive of this article in case it goes down for some reason. https://perma.cc/23ZX-JZZB https://perma.cc/23ZX-JZZB (FYI: Perma.cc,

Here's a permanent public archive of this article in case it goes down for some reason. https://perma.cc/23ZX-JZZB https://perma.cc/23ZX-JZZB (FYI: Perma.cc, an anti-link-rot service run by Harvard Law School, is free for up to 10 links per month. The project is run by my department, but I'm not on the Perma team.)