Abstract

We learn a lot. Friends tell us about their lives. Books tell us about the past. We see the world. We reason and we reflect on our mental lives. As a result we come to know and to form justified beliefs about a range of topics. We also seem to keep these beliefs. How? The natural answer is: by memory. It is not too hard to understand that memory allows us to retain information. It is harder to understand exactly how memory allows us to retain knowledge and reasons for our beliefs. Learning is largely a matter of acquiring reasons for changing views. But how do we keep reasons for the views we keep? The epistemology of memory concerns memory’s role in our having knowledge and justification. This branch of epistemology, unlike nearly all other branches, addresses our having knowledge and justification over time. This article reviews the major epistemic roles that philosophers have assigned to memory. Section 1 surveys the nature of memory and the various memory systems. Some philosophers think the relation knowledge bears to at least one memory system is maximally strong: remembering just is a way of knowing. Section 2 covers this strong relation. Section 3 canvases the main problems that data on human memory pose to theories of justification and the central attempts to solve these problems. Section 4 discusses the historical and contemporary responses to two main skeptical challenges about memory.