Abstract
The redefinition of logos as an appeal to logic is a mistaken association found all too often in the technical communication classroom. Logic inheres in all three proofs of persuasion; moreover, Aristotle used logos within the context of classical rhetoric to refer to the argument or speech itself. In this light, the proofs of persuasion represent the set of all logical means whereby the speaker can lead a “right-thinking” audience to infer something. If that something is an emotion, the appeal is to pathos; if it is about the character of the speaker, the appeal is to ethos; and if it is about the argument or speech itself, the appeal is to logos. This interpretation reinstates all three proofs of persuasion as legitimate, logical means to different proximate ends and provides a coherent definition of logos, consonant with Aristotle's Rhetoric, to the next generation of technical communicators.