I don't find it useful to argue/debate unless it's in front of an audience and the topic is important to me. I and my opponent are both human. I expect them to dig in their heels, just as I most likely will too. I go into it believing they will not be convinced ever. Instead, my goal is to get the audience to see my way of things. They don't have a stake in the argument, they're not having to worry about losing or winning, being right or wrong. Naturally, they can change their minds in silence and not "lose face" so to say. I consider myself to have won if I've convinced the observers, even if my opponent gets the last word.