But, if someone is coming at me with something that really makes sense and has some real thought behind it, then I become very open. My 99% sureness, will maybe go down to 80% and I'll think, "Hmmm........let's talk about this. Maybe I haven't fully explored this like I thought."
Your argument/point of view has to be logically sound. If your premises are faulty to begin with, then there's really no point discussing your conclusion. That's what I mentioned earlier about being able to tell if someone has even thought about what they're talking about. If you're just jumping from A to Q without there being any real connection between A and Q, then you're just talking to entertain yourself. If the person at least has made logical conclusions and given the topic real thought, then it opens me up and I want to talk further, (a) so I can learn from you, and (b) to see where you're coming from.