Gordon Brown: The notion of adjacency and nugget size is really, really interesting to me in the design of these systems. We're right now in this funny little exploratory phase where there's a bunch of different kinds of software that don't play nicely together. What I'm trying to find is the minimum set of enabling rules rather than a sort of maximal set that would force everyone in line. It's basically an envelope format that allows you to add some key value metadata to define aversion history.