Argument:

"Discourse intended to persuade."
"A coherent series of statements leading from a premise to a conclusion."

In a non-totalitarian society, you need not be persuaded nor do you have to agree with the conclusion.

This argument was provided by the person who posted the blog entry. I was merely re-posting it so that people who are still making up their minds (as I was a long time ago) might be able to consider this viewpoint. I stated my disclaimers. I don't see the contradictions.

That you choose to define Argument as "Quarrel or Disagreement" speaks to your mindset.