Yet the matter of the epistemology of memory belief is important for its own sake as well. Virtually all of what we know (or are justified in believing) at any given time resides in memory.  However, epistemology has been focussed almost exclusively, even if implicitly, on the epistemology of belief formation — of coming to believe a proposition.  Yet it is not at all clear that the conditions necessary and sufficient for justifiably coming to believing a proposition are necessary and sufficient for justifiably maintaining it.  So if we are to understand how we know the vast majority of what we know at any given time, we'll need an account of the epistemology of memory. This essay will focus on the issues that arise when one attempts to construct such a thing.