Some glitch seems to have occurred that prevents readers from posting comments. This appears to be a general problem with WordPress and not just this website, as other sites are having the same difficulty. I (and I’m sure others) have notified WordPress, and I hope it’ll be fixed soon. In the meantime, hold onto your comments.
UPDATE: Some comments seem to be getting through, but not many. What seems likely, based on the comments that have gotten through, is that commenting from mobile devices works, but from computers does not. If you try posting, use your phone if possible.