This chapter shows that contrary to the prevalent view, in his De Interpretatione 8, Aristotle is concerned with homonymy; more precisely, with homonymy of linguistic expressions as it may occur in dialectical argument. The first part argues that in Soph. el. 175^b39-176^a5, Aristotle indubitably deals with homonymy in dialectical argument; that De Interpretatione 8 is a parallel to Soph. el. 175^b39-176^a5; that De Interpretatione 8 is concerned with dialectical argument; and that De Interpretatione 8, too, deals with homonymy in dialectical argument. The second part of the chapter discusses objections that have been put forward against the view that De Interpretatione 8 is about homonymy and shows that they do not succeed.
Keywords: homonymy, linguistic expression, dialectical argument