Stuff (worlds, markets, electorates, people over time, optimising systems, auctions, negotiations) is made of bits (persons, actors, voters, time-slices, optimisers, bidders, negotiators) which can be seen as wanting and believing various things. How the wants and beliefs of the bits should be combined into analogous wants and beliefs of the system as a whole is never straightforward. Impossibility results often apply to criteria of rightness, decision procedures, or axiological assessments of the stuff as a whole. These results often generalise to the other stuff-bit relations.