Thus, logic has an ontological basis. And the ontology that finds expression by means of logic is assumed to be intelligible in the sense of amenable to logical statement. By saying this, Aristotle, like Plato before him, sought to answer the Sophists. They, he argued, had ignored logic’s ontological basis, asserting boldly that “what one person calls a man, another may call a mouse, and not a man. Hence, the same thing would be both man and not-man.” But in speaking thusly, they had overlooked the