But a more difficult part of the story comes from cognitive psychology. Partisanship motivates reasoning, and motivated reasoners can see the same facts in radically different ways. Give a conservative more science about global warming, and s/he will be even more convinced that global warming science is fake. And not because s/he’s stupid. Indeed, the most terrifying truth about motivated reasoning is that the more intelligent you are, the more capable you are at bending the facts to fit your story.