He ruins his good points by not being able to follow through though. He throws something out there to think about, but never is able to explain WHY. He just says "I've been around, I know my shit, you kids are stupid."
I love it when someone who really does know what they're talking about just steps in and completely proves everyone wrong (including me) just so we all learn something. It's happened to me a couple times and although it's embarrassing, it's not so bad when you're in the same boat with everyone else.
But the fact that those guys are so intelligent probably has something to do with them not getting into these kinds of arguments :)