You've probably found it by now, but Neville did an interview with Ratcliffe a few months ago which was err interesting

www.youtube.com/watch?v=iclj...

One of many oddities of work on crypto is how so many try to answer the Q of what our rights/duties should be by conceptual analysis. Pointing out features of 'property' can't get us the answer. And that's before we get to the issue that so many pick out the wrong features.