A Linguistic Muddle. Sextus’ Arguments against Universals at PH 2.227–8

At Outlines of Pyrrhonism (PH) 2.227–8, Sextus Empiricus argues that certain entities which his adversaries hold to be one and the same for different individuals are in fact not. This he does by, among other things, considering the truth-value of sentences of which the subject is a common noun, thereby drawing an interesting connection between metaphysics and semantics. In this article, I provide a careful analysis of Sextus’ arguments at PH 2.227–8 and explore the origins and limits of such a connection. In particular, I argue that Sextus’ argument at PH 2.227 probably reflects a Stoic argument against Aristotelian essences, thereby relying on specifically Stoic doctrines about universals and common nouns, whereas his next argument at PH 2.228 targets accidents. If this is true, it follows that the overall structure of PH 2.227–8 fits well with the typically Aristotelian distinction between essence and accident.