Abstract
Wedin argues, against prevailing opinions, that Aristotle's account of homonymy, synonymy, and paronymy, with which the Categories begins, must be understood as an integral part of the treatise. The three ‘onymyies’, as Wedin calls them, are grouping principles, or one‐over‐many principles, that each collect a number of items under a single term. Wedin focuses on synonymy in particular, because it enables Aristotle to construct a theory of the fundamental kinds of things that are, and as such provides the basis for the system of the categories. For Wedin, the Categories is not just concerned with classification but also with ontology and semantics: it offers a theory about the underlying ontological implications of standard categorical statements, with the aim of determining what must exist, and in what relations these things must stand, in order for the statements to be true.