There’s a special kind of irritation I feel whenever somebody starts trying — earnestly and urgently — to tell me about some New! Amazing! and Probably Subversive! thing that I already know. It’s a combination of “I will not be manipulated by emotional argument, dammit!” and “You mean you only just now heard about that?” and “Stop being on my side, you’re annoying me!”, with the exact proportions varying by subject matter.
Scientific theories mostly just get the middle, or “I thought everybody knew that” reaction. I remember being mildly surprised, for example, the first time — back in the eighties, I think it would have been — that I saw plate tectonics described in the popular press as a new and until-recently controversial geologic theory, because everybody I knew had known about plate tectonics for ages. Granted, I spent my high school years back in Texas attending meetings…
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