I wholeheartedly disagree. I have a PhD in math and a terrible memory. I pick up methods, not facts. I'd say that I got good because I learned to re-derive e

I wholeheartedly disagree. I have a PhD in math and a terrible memory. I pick up methods, not facts. I'd say that I got good because I learned to re-derive everything from scratch, and practiced enough to do that in the heat and pressure of an exam.