No matter what exactly the facts about the metaphysics of memory and the analysis of remembering are, we will need a more precise characterization of the notion of a memory belief before we can proceed. To begin with, it will be useful to see what memory is not. First, it is tempting to think that memory is knowledge of the past. But this definition is doubly problematic.  Although everyone but the skeptic thinks that there is memory knowledge, it is universally agreed upon that not every belief in memory is an instance of knowledge.  There is remembered false belief.  The second reason that memory can't be defined as knowledge of the past is that one can remember an event that has yet to take place or at least an event that is temporally present.  I might recall now that I have a doctor's appointment in two hours. One might take this to be memory of a future event. However, it can be reasonably argued that this is only a recollection of the fact that I currently have an appointment to see the doctor at a future time. 