I'm not so sure this is how brains work. I get the impression both from what I've read and uh... personal operation.. that the resolution of memories fades with

I'm not so sure this is how brains work. I get the impression both from what I've read and uh... personal operation.. that the resolution of memories fades with time/disuse which likely makes "space" for new information. Brains have a very high plasticity. You might say well if you forget what you once knew are you still you. I'd argue you go through this several times already in our relatively short current lifespan. Are you the same guy at 35 as you were in your early 20s? I'm sure not.