When I read a non-fiction book, I often take notes. I've brought out of the closet a dozen notebooks of various sizes and color and as I scanned through them, I wondered: If I read a book again, by chance, would I remember that I've read it before? Would I take essentially the same notes? Would taking the same notes suggest I didn't really internalize anything from my first reading of the book? It would seem to suggest I'm stuck. Or, does it simply reflect the fact that we need refresher courses in everything. We forget!
There's more to this. I'll need to come back to it. I've barely scratched the surface of my questions.