By chance, I am a doctor. I spend a lot of time looking things up, even things I'm 80% sure about. Yes, it's useful to have that knowledge already, and to that

By chance, I am a doctor. I spend a lot of time looking things up, even things I'm 80% sure about. Yes, it's useful to have that knowledge already, and to that I'd say that copying out a textbook is a poor way to learn. It's far better to know the processes behind things or to learn through experience.