Most of the time we talk, argue and debate people, especially the educated without validating the source of their ideas and views. Where are their ideas and viewpoints coming from? Their talking heads. The problem arises when they change their heads, views and ideas in the blink of an eye. And they start, we meant this, and we did not mean that.
I do enjoy talking, debating, and learning from people whose ideas are documented and easily trackable in any format, written, audio or video. People with documented views are much better in taking and defending a stand. At least, we know what they stand for and stand on.