(An important lesson, but I wonder if it's wise to teach it in the context of politics. Among other things, I worry that the messages "boo religion!", "yay updating on evidence!", "boo religious conservatives!", "yay pointing out my enemies are inferior to me!", "yay rationality!", "yay my side for being comparatively rational!", &c. will become mixed up and seen as constituting a natural category even if they objectively shouldn't be. (Related.))