Why Are Scientists Willing to Accept Other Scientific Theories?

It’s very easy to make fun of not-so-educated people who reject evolution, but what happens when one of the most prominent contemporary philosophers, Jerry Fodor, writes a book about “What Darwin Got Wrong”? Similarly, we can dismiss extreme right wing politician like Senator Jim Inhofe of Oklahoma, who thinks global warming is a worldwide conspiracy of crazy scientists bent on destroying the American way of life. But what happens when two icons of the skeptic movement, Penn & Teller, do a whole show in which they completely deny all the well established evidence of anthropogenic climate change. And of course it is easy to laugh at Jenny McCarthy, the kook who claims (with Oprah Winfrey’s support) that she “just knows” that vaccines cause autism. But, what happens when a politically savvy atheist like Bill Maher says that people who get flu shots are “idiots?"