 The most general metaphysical category is the category “thing”. I use ‘thing’ as the most general count-noun. Everything is a thing. A thing is anything that can be referred to by a third-person singular pronoun—as when I say, “The following is true of everything, that it is identical with itself.” The category “thing” comprises everything there is, everything that exists (for I take a stern anti-Meinongian line about non-existents: non-existents simply don’t exist: the number of them is 0). (2007: 199)