Plato's closing reference to the Iliad in the Sophist has been largely overlooked in contemporary scholarship. The reference, a quotation from the confrontation between Glaucus and Diomedes in Book 6, forms part of a broader frame to the dialogue. The frame, with its recurring themes of identification and misidentification, helps us make better sense of the dialogue's final description of the sophist and its central concerns about the relationship between philosophy and sophistry. It also provides a revealing case study of Plato's use of Homer as part of a broader strategy for undermining simple appeals to authority.