 The possibility of grinding out mass nouns with the universal grinder is limited to predicates that refer to things we can imagine being grindable in their extensions – it’s hard to see how one gets a mass interpretation of ‘melody’ by grinding. The applicability of the universal grinder, moreover, is not linguistically universal in its ability to imbue one and the same noun with a mass interpretation.  The count/mass distinction concerns, in part, whether nouns supply a criterion for counting (explaining why count nouns play well with numerical determiners). Thus, continuing our example of ground guitars, notice that (38) doesn’t entail and isn’t entailed by (39):