Discovered, from a tutor who kept all four of their early essays in one folder out of pure stubbornness, that a serious argument can survive being made by four people who disagreed with each other constantly. Keeps that same battered folder, or a close copy of it, on the shelf as a reminder that a school of thought is sometimes just several people refusing to let an idea drop. Holds tutorials in a college garden whenever the weather allows, on the old habit of pairing a hard argument with a walk.