I normally find articles with titles like that painfully condescending, but this was quite well-done and worth a read.
If you've not read anything from his blog before, it's worth at least skimming back through the archives to see what tickles your fancy. He's got some VERY good articles.
It does make me wonder how many different knots are common for one to be attacking at any given time (not moment, just in general).
He also worked with Apple and Borland. Not your average tech blogger.