Brotherton: It's not quite like journalism where journalists are often trained to give both sides of the argument. In science, we're really worried about which side is right, and you discuss both sides only to the extent of figuring out which one's right. It's not one opinion versus another. It's one set of ideas supported by a certain set of observations against another set of ideas supported or not supported by the same set of observations and trying to figure out which one is a better explanation for how things work.