Exactly. My compsci prof was forcing us to learn so much by heart, but then it's internalized and you start to think in those terms. Right now I am writing my PhD thesis in management and in the beginning I didn't have all of those papers really in my head. But now slowly that knowledge accumulates and I can think through things I couldn't think before. But on the other hand, I now think, how could I not understand that, it's trivial. And to add, it is the same for literature and poems. If you know a poem by heart, it's not just fancy to recite it, but that you start to really incorporate part of that language.