 Every criterion put forth for distinguishing between +MASS and +COUNT faces significant—and seemingly systematic—counterexamples. We attempted to side-step such problems in  Section 1  by stipulating that there is a difference between ‘nouns/terms/expressions used with a mass sense,’ versus ‘nouns/terms/expressions used with a count sense,’ but forebore giving an account of what gives particular instances the sense they do have. (More detail on this can be found in the  “Logic of Mass Expressions”  entry). Then, using the rough-and-ready characterization of +COUNT versus +MASS (or things versus stuff) we, mirroring our authors, went on to exploit the distinction for our ends of taxonomizing the world’s inhabitants and describing their features.