Moreover, we keep talking about "discerning", "intentional", or "willed" patterns. But isn't a big part of our self (in the form of the unconscious, full of repressed memories) unavailable to us? Don't we develop defence mechanisms against repressed memories and fantasies, against unconscious content incongruent with our self-image? Even worse, this hidden, inaccessible, dynamically active part of our self is thought responsible for our recurrent discernible patterns of behaviour. The phenomenon of posthypnotic suggestion seems to indicate that this may be the case. The existence of a self-identity is, therefore, determined through introspection (by oneself) and observation (by others) of merely the conscious part of the self. But the unconscious is as much a part of one's self-identity as one's conscious. What if, due to a mishap, the roles were reversed? What if Dan's conscious part were to become his unconscious and his unconscious part - his conscious? What if all his conscious memories, drives, fears, wishes, fantasies, and hopes - were to become unconscious while his repressed memories, drives, etc. - were to become conscious? Would we still say that it is "the same" Dan and that he retains his self-identity? Not very likely. And yet, one's (unremembered) unconscious - for instance, the conflict between id and ego - determines one's personality and self-identity. The main contribution of psychoanalysis and later psychodynamic schools is the understanding that self-identity is a dynamic, evolving, ever-changing construct - and not a static, inertial, and passive entity. It casts doubt over the meaningfulness of the question with which we ended the exposition: "Who, exactly, then, is Dan?" Dan is different at different stages of his life (Erikson) and he constantly evolves in accordance with his innate nature (Jung), past history (Adler), drives (Freud), cultural milieu (Horney), upbringing (Klein, Winnicott), needs (Murray), or the interplay with his genetic makeup. Dan is not a thing - he is a process. Even Dan's personality traits and cognitive style, which may well be stable, are often influenced by Dan's social setting and by his social interactions. It would seem that having a memory is a necessary but insufficient condition for possessing a self-identity. One cannot remember one's unconscious states (though one can remember their outcomes). One often forgets events, names, and other information even if it was conscious at a given time in one's past. Yet, one's (unremembered) unconscious is an integral and important part of one's identity and one's self. The remembered as well as the unremembered constitute one's self-identity. IV. The Memory Link