If you're really keen, read Scott's article: http://www.scottaaronson.com/blog/?p=3294 http://www.scottaaronson.com/blog/?p=3294 About half way down is a secti

If you're really keen, read Scott's article: http://www.scottaaronson.com/blog/?p=3294 http://www.scottaaronson.com/blog/?p=3294 About half way down is a section that starts "But of course this still leaves the question: what is in the mathematical part of Hoel’s Entropy paper? What exactly is it that the advocates of causal emergence claim provides a new argument against reductionism?" ...but basically, I wouldn't bother. I regret the time I wasted deciphering what it was on about already.