 If Hume is right, then the concept of an object includes the concept of existence, and the concept of a nonexistent object would be as self-contradictory as the concept of a round square. If existence is not a predicate of individuals, then one might suppose that neither is nonexistence. Therefore, if Frege is right, to say of an object that it is nonexistent is a kind of nonsense that arises from a violation of logical grammar. (For Frege and those who follow him, a claim like “God exists/does not exist” is to be understood as a claim about the concept God, or about the property of being God. On this view, the logical form of “God exists” is not Exists (God)—where Exists is a predicate of individuals, but rather: The concept God applies to something, or Something possesses the property of being God.)