A puzzler:
John Locke called person a forensic concept. What he had in mind is that a person is one to whom credit and blame may be attached, one who is deemed responsible. The concept of a person is the concept of an agent. Crucially, Locke argued, persons are not the same as human beings. Dr. Jekyl and Mr. Hyde may be one and the same human being, that is, one and the same continuously existing organic life; they share a birth event; but they are two distinct persons. And this is why we don't blame the one for the other's crimes. Multiple personality disorder might be a real world example of this.
The Dish 