Audio-Video Podcast 6 — The Ad Hominem Fallacy
The ad hominem fallacy seems to be the most common. It is attacking the person instead of the topic. This is very easy to do, especially when someone throws down and indicates that they are not interested in rational discourse, they simply want to negate whatever you have to say with a distraction of insulting you instead of dealing with the discussion at hand.
Edit: He kept at it. Some people do not learn.