They have European or below average European IQs. I've heard him in interviews discussing his prep. He studies all of the popular talking points and related factoids. Frequently. He's been at it a long while at this point. He's prepared because he studies. You can too. The more you practice the smarter you sound. Don't get me wrong, I do not believe him dumb. I do, however, believe if most of the people wanted to and mastered a talking point and how to approach topics, you'd make people believe you're extremely smart too (no offense, I don't know one way or another). As I said. Pick a topic and master it. Own it.