Here I'm going to talk about some dirty tactics that bad and dishonest people often use to try to win arguments without actually finding a flaw in your reasoning. (Though note that most of these aren't always done intentionally.) I'll go ahead and not talk about the obvious technique of interrupting your opponent so they can't make their case, since that one is pretty universally looked down on to the point that it's often suicidal (kind of like flaming).