> He was a test pilot who was later given command of a group responsible for that textbook. It sounds like he's not supposed to just follow the textbook; he's s

> He was a test pilot who was later given command of a group responsible for that textbook. It sounds like he's not supposed to just follow the textbook; he's supposed to know when the textbook is too vague, and dig deeper. Isn’t that only for test flights?