 Rich Properties and Haecceity Properties. Socrates can exist without his rich property; ergo, he can exist without his rich property instance; ergo, Socrates cannot be a rich property instance or any property instance. The truth of the initial premise is fallout from the definition of ‘rich property.’ The R of x is a conjunctive property each conjunct of which is a property of x. Thus Socrates’ rich property includes (has as a conjunct) the property of being married to Xanthippe. But Socrates might not have had that property, whence it follows that he might not have had R. (If R has C as a conjunct, then necessarily R has C as a conjunct, which implies that R cannot be what it is without having exactly the conjuncts it in fact has. An analog of mereological essentialism holds for conjunctive properties.)  And because Socrates might not have had R, he might not have had the property instance of R. So Socrates cannot be identical to this property instance. What Mann needs is not a rich property, but an haecceity property: one that individuates Socrates across every possible world in which he exists. His rich property, by contrast, individuates him in only the actual world. In different worlds, Socrates has different rich properties. And in different worlds, Socrates has different rich property instances. It follows that Socrates cannot be identical to, or even necessarily equivalent to, any rich property instance. An haecceity property, however, is a property Socrates has in every world in which he exists, and which he alone has in every world in which he exists. Now if there are such haecceity properties as identity-with-Socrates, then perhaps we can say that Socrates is identical to a property instance, namely, the identity-with-Socrates of Socrates. Unfortunately, there are powerful arguments for rejecting haecceity properties (Vallicella 2002, 99–104). So we ought to conclude that concrete individuals cannot be identified with property instances, whence follows the perhaps obvious proposition that no person is a property instance, not God, not me, not Socrates.