I think what GP meant is that we already learn a lot of things through "spaced repetition" even if we're not consciously applying that technique. E.g. if you dr

I think what GP meant is that we already learn a lot of things through "spaced repetition" even if we're not consciously applying that technique. E.g. if you drive the same route repeatedly, eventually you'll remember the way without needing to look at a map. That's spaced repetition.