Given: the existence of X.
Given: the existence of myself
Given: X’s obsessive interest in me.
Given: the universe we share together, he and I, which has subsided into an area about two miles square in the center of this city.
Hypothesized: X follows me continually, whenever I go out, for one of several reasons that are mutually exclusive. He is on a mission of reclamation, a private detective hired by my father; he is a police agent; he is an acquaintance in disguise or an acquaintance of someone I know/have known, who wants revenge for a real/unreal offense I have committed.