Robinson on Kuhn on Priestley

…he recalled something that Kuhn had written about Priestley – that a scientist who continued to resist after his whole profession had been converted to a new paradigm might be perfectly logical and reasonable, but had ipso facto ceased to be a scientist.

-- Kim Stanley Robinson, Green Mars, p. 147

PS: I am 2/3rds of the way through Robinson's Mars trilogy, and it's some of the best science fiction I've ever read. It is thoroughly grounded in science (as far as I can tell), but imaginative and believable. In other words, the best kind of SF.