Reading, Logic and Rhetoric, that is what used to be taught.

Today's schools only teach rhetoric. Here are the conclusions, memorize them and then repeat them. And! You are good person if you repeat them well, and a bad person if you don't. Thus, you end up with a person who will defend their "knowledge" as if their life depends on it.

So, most people's arguments is, "this is what I learned, and you better accept it too."