I think this is almost at the truth. My view is that everyone values two frequently opposing things: truth and social reward. Whether you behave like (1) or (2) depends on which you value more, and how much pressure is being applied from either direction. I like to think that most people usually value being correct over social reward but this is not always the case, and frequently this difference in values results in totally unproductive arguments. There is no persuading someone who defends a position for social reward. The best thing you can do is try to make their position seem absurd and silly as a social punishment, and hopefully witnesses will think agreeing with you will result in higher social reward. I believe this is also why high profile debates are frequently just two people slinging insults back and forth. This is actually what a significant number of people find persuasive, since it determines whether their social circle will reward them or punish them for their beliefs.