Yes Yvain's post and a lot of the comments in there are pretty damn amazing.
In particular, after reading this one by JenniferRM, I wanted to hire her to give me some advice on how to help a friend I have where I am totally stuck about what to do, which is just amazing considering the intention behind her post flipped off into weirdtopia half way through and it ended up containing two completely different valuable messages in the one comment.
However useful the content, what are some examples of the best nonfiction writing on Less Wrong? Are there pieces you think are as good as recent classics of essay form like I Think You're Fat or Lies We Tell Kids? For example, I like Yvain's The Apologist and the Revolutionary.
Which pieces would you nominate as some of the best nonfiction writing on Less Wrong?