I find this really annoying about Paul's otherwise insightful and interested articles. Namely that he assumes you know everything he's written and when and what it was called and that you know how to easily find it so you can understand the context.
Paul, would you PLEASE date your articles (and RFS for that matter) and link to whatever it is you're talking about?
To be fair, unless someone goes and posts the URL to Hacker News or something, the only way you'd get to this post is by reading "What You Can't Say" and reading the links at the bottom. His top-level essays do have the date on them.