If you take comment length + karma per post / comments on post you should end up with reasonably decent comments making it to the top. Ish. It's still never goi

If you take comment length + karma per post / comments on post you should end up with reasonably decent comments making it to the top. Ish. It's still never going to be able to fully deal with all the corner cases on a site as large as HN but it's often Good Enough.