 They don't have nightmares or anything like that. And we're quite used to the fact that anybody who thinks otherwise is just benighted, is just wrong. And I think the case for evolutionary biology is now so secure that it's simply out of date to suppose that we shouldn't teach it. If it's controversial to people, they're going to have to suck it up and get used to the fact that that's the way the world is. The case is so overwhelming if you accept the canons of scientific rationality.