Is this really a self-contained series? I just skimmed a few of the articles quickly and the fourth article references an article on QM by Eliezer Yudkowsky which doesn't seem to be part of the series. But there's a link at the top which suggests that it is part of a (maybe different?) series. If I cycle backwards through these "previously in the series" links, I pass through more of these articles which doesn't seem to be contained in the series which is referenced here. Eventuall, I arrive at the article I started from - namely the fourth article of the series which is referenced here. This seems very confusing to me and I would appreciate a clarification whether there are multiple series and in which order the articles are supposed to be read.