“Writing, I reminded them, can’t be taught or learned in a vacuum. We must say to students in every area of knowledge: “This is how other people have written about this subject. Read it; study it; think about it. You can do it too.” In many subjects, students don’t even know that a literature exists—that mathematics, for instance, consists of more than right and wrong answers, that physics consists of more than right or wrong lab reports. I”