That was basically his MO. Learning things and discovering things are really the same thing in the end, and he was good at it. I doubt he ever did anything that

That was basically his MO. Learning things and discovering things are really the same thing in the end, and he was good at it. I doubt he ever did anything that didn’t have the possibility of teaching him something new. Even the really mundane things like reviewing textbooks for his local school board, or visiting a high school in Brazil as an invited speaker, he seems to have always approached everything with the goal of learning something. Of course sometimes he only discovered the mundane facts that American textbooks are badly written and the review committees basically never actually read them, but learning was accomplished.