Many years ago, Dabney House held a extra super official philosophy discussion on "The Distinction Between Things and Stuff". I recently recalled this discussion, and wondered if the following notions are relevant :
Things are members of finite or countable sets, while stuff is a subset of an uncountable set. I'm not sure what a single element (or other measure-zero subset) of an uncountable set would be... perhaps "nothing".
Confusing theorems like the Banach-Tarski paradox suggest that, if you are working with uncountable sets, notions of volume are poorly defined. This paradox says that if you define a sphere, there is a way to cut up the sphere into parts that can be re-assembled into two spheres. At first glance, this would seem to be an amazing violation of common sense. The reconciliation of this paradox, however, is simply that the human notion of "volume" works poorly on uncountable sets ( and maybe even countably infinite sets). As far as I know, the Banach-Tarski paradox can not be phrased on finite sets of points.
This would imply that "stuff" can not have a definite volume or area, and that some of what we call "stuff" is in fact a very large collection of "things".
Anyway, I'm not an expert or even passably competent in most areas of math, so if F reads this he's probably going to thing "this is dumb, and also wrong, and dumb".
... that is all.