Super Autobiographical Memory Face

If you remember all you learn nothing...

Nietzsche thought the ability to forget was an active power, not something passive: i.e. merely the absence of the ability to remember. He considered it an essential development in man's psychological evolution, which enables insensitivity to the present, planning, focus higher order thinking, etc.

That's an interesting point. I'd suspect prioritization to be the active process while things thrown to the "common heap" are incidentally forgotten. I'll be sure to look into that.