If it's worth saying, but not worth its own post, then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should start on Monday, and end on Sunday.
4. Unflag the two options "Notify me of new top level comments on this article" and "
My apologies for the misunderstanding. I agree that (conditional on doing all this stuff) you wouldn't want "twenty-first" corresponding to 20 even if you had "twenty-second" corresponding to 21.