Brief and to the point. I'd quibble with only two parts of it: I don't think pentameter is strictly needed, though it is the default in English, and I'd like to exclude poems that are seven couplets -- there needs to be some sort of interlocking. I cannot put my finger on exactly why I want to make that last caveat -- will need to think on this anon. As for the former, see today's post.

---L.