“We argue for our positions, and get annoyed if they are challenged. Why do we do this? The obvious answer is that we believe the views we express (ie, we think they are true), and we want to get others to believe them too, becausethey are true. We want the truth to prevail. That’s how it seems. But do we really believe everything we say? Are you always trying to establish the truth when you argue, or might there be other motives at work?”