"If Mitt Romney doesn't 'know' global warming is mostly caused by humans, is he 'against science'?"

John Althouse Cohen challenges Krugman... and quotes Richard Feynman, who wrote:

It is necessary and true that all of the things we say in science, all of the conclusions, are uncertain, because they are only conclusions. They are guesses as to what is going to happen, and you cannot know what will happen, because you have not made the most complete experiments....

Scientists, therefore, are used to dealing with doubt and uncertainty. All scientific knowledge is uncertain....

So what we call scientific knowledge today is a body of statements of varying degrees of certainty....

John says:

If Krugman is terrified at the idea of not 'knowing,' maybe he's the one who's against science.

I was going to challenge that "maybe," but that would be unscientific.

There are way too many political speakers embarrassing themselves these days by preening about how scientific they are, when all they mean is that they defer to authority. And there are way too many scientists who step up and pose as authorities to be deferred to (and given grants to).