 A better solution replaces memory with the more general notion of causal dependence (Shoemaker 1984, 89ff.). We can define two notions, psychological connectedness and psychological continuity. A being is psychologically connected, at some future time, with you as you are now just if she is in the psychological states she is in then in large part because of the psychological states you are in now (and this causal link is of the right sort: see Shoemaker 1979). Having a current memory (or quasi-memory) of an earlier experience is one sort of psychological connection—the experience causes the memory of it—but there are others. The important point is that our current mental states can be caused in part by mental states we were in at times when we were unconscious. For example, most of your current beliefs are the same ones you had while you slept last night: they have caused themselves to continue existing. We can then say that you are psychologically continuous, now, with a past or future being just if some of your current mental states relate to those he or she is in then by a chain of psychological connections.