He’s discussing design and advertising, but it applies to science equally well:

Paul-Rand.com :: Design and the Play Instinct: “If possible, teaching should alternate between theoretical and practical problems-and between those with tightly stated ‘rules’ imposed by the teacher and those with rules implied by the problem itself. But this can happen only after the student has been taught basic disciplines and their application. He then is able to invent his own system for ‘playing the game’. ‘A mind so disciplined should be both more abstract and more concrete. It has been trained in the comprehension of abstract thought and in the analysis of facts.’”

Fantastic in an Ockham’s sort of way.