What an argument is not

When I think of an argument I think of two people going back and forth talking over each other, trying not to let the other person get a word in. In my opinion this goes under the abuse category in what an argument is not. However, the debate today between Dr. Layne and a student was exactly what an argument is. They both had good reasons and logic for how they felt the way they did about relativism/nihilsm. While both were passionate about how they felt neither tried to talk over the other person. I'm not a person that really likes to get into debates but this type of debate is a reason why a class like philosophy can be very interesting.