What does it tell you when someone says "I don't believe in evolution"?

Maybe not what you think, says Dan Kahan, a professor of law and psychology at Yale. In an interesting piece about the findings of a new Pew survey, he makes a case for why saying you don't believe in evolution isn't necessarily a sign of being anti-science, and points out how belief in evolution isn't as clearly broken down along political party lines as you might guess.