The reason he imposes this is because he believes it causes us to assume we are the same in our memories as we are now. Hume says our memories are triggered by ideas, or perceptions caused by thinking about an impression, instead of actually experiencing it. These memories at best resemble one another, which means we confuse similar but different impressions of ourselves for an impression of a single unchanging self. Moreover, Hume says we do not have the same ideas as we do now and do in the past. As a result memory gives us false
identity with what it remembers. With this, the nature of the human self is derived from these mental experiences. Although Hume maintains that personal identity is falsely assumed by humans, the ideas that arise from our memories are what forms one’s identity. The end result of personal identity is that individuals have a false sense of identity, but that this false sense of identity is what gives them their individuality. This whole process is reliant upon memory; hence memory is crucial in the development of the false self and individuality.
Contrary to Hume, Locke believes memory is reliable. He insists that we are able to genuinely recall the same memories. Similarly to Hume, Locke agrees we don’t remember everything. Although he shares this belief, he feels what we do remember is enough. He continues this assertion as he points out we don’t remember everything accurately but we remember enough accurately. In doing this, we are able to accurately recall past ideas and compare them with present ones. This is how he reaches his point that memory is reliable.