Hume said that to be considered in possession of a mind, a creature needs to have a few states of consciousness linked by memory in a kind of narrative or personal mythology. Can this conjecture be equally applied to unconscious mental states (e.g. subliminal perceptions, beliefs, drives, emotions, desires, etc.)? In other words, can we rephrase Hume and say that to be considered in possession of a mind, a creature needs to have a few states of consciousness and a few states of the unconscious - all linked by memory into a personal narrative? Isn't it a contradiction in terms to remember the unconscious? The unconscious and the subliminal are instance of the general category of mental phenomena which are not states of consciousness (i.e., are not conscious). Sleep and hypnosis are two others. But so are "background mental phenomena" - e.g., one holds onto one's beliefs and knowledge even when one is not aware (conscious) of them at every given moment. We know that an apple will fall towards the earth, we know how to drive a car ("automatically"), and we believe that the sun will rise tomorrow, even though we do not spend every second of our waking life consciously thinking about falling apples, driving cars, or the position of the sun. Yet, the fact that knowledge and beliefs and other background mental phenomena are not constantly conscious - does not mean that they cannot be remembered. They can be remembered either by an act of will, or in (sometimes an involuntary) response to changes in the environment. The same applies to all other unconscious content. Unconscious content can be recalled. Psychoanalysis, for instance, is about re-introducing repressed unconscious content to the patient's conscious memory and thus making it "remembered". In fact, one's self-identity may be such a background mental phenomenon (always there, not always conscious, not always remembered). The acts of will which bring it to the surface are what we call "memory" and "introspection". This would seem to imply that having a self-identity is independent of having a memory (or the ability to introspect). Memory is just the mechanism by which one becomes aware of one's background, "always-on", and omnipresent (all-pervasive) self-identity. Self-identity is the object and predicate of memory and introspection. It is as though self-identity were an emergent extensive parameter of the complex human system - measurable by the dual techniques of memory and introspection. We, therefore, have to modify our previous conclusions: Having a memory is not a necessary nor a sufficient condition for possessing a self-identity.