Reference to persons with personal pronouns raises the issue of the primary referent and its nature. “I” does not refer to a property or cluster of properties. This contrasts with our identifying grasp of persons. A person is a radical singularity and thus stands in contrast to a kind or sortal term. The individuation of persons is not adequately grasped by “definite descriptions” or “eidetic singularities.” In spite of the seeming possibility of persons being wholly identical in terms of properties, in other words, “doubles,” the core referent of reference to persons is not to what is individuated merely by mere numerical differences or spatial-temporal, and essential-eidetic determinations. Rather we have to do with a “non-sortal unique e...