When we learn something, generally speaking, we have acquired some kind of knowledge. But what about when we forget things? It seems intuitive to say that we don't know the thing in question anymore. Yet often, we will suddenly remember things we forgot without learning them again - spontaneously, so to speak. So during the period between the forgetting and the remembering, do we know the information and not have access to it, or do we not know it? How should we conceptualize spontaneous remembering in such cases?