A few years ago, I made a outline of Evan G. Williams' excellent philosophy paper, for a local discussion group. It slowly got circulated on the EA internet. Somebody recently recommended that I make the summary more widely known, so here it is.
The paper is readable and not behind a paywall, so I'd highly recommend reading the original paper if you have the time.
I'm uncertain whether it makes sense to link summaries on the EA Forum instead of just the original paper. I'm more than happy to take this post down if advised to do so.