User hderms didn't describe them, I did. And I can show you hundreds of thousands of channels like I describe, on most popular IRC networks (Freenode is a tiny network in comparison).
Also, I challenge you to show me proof of intelligent discourse in any Freenode channel. It's simply not easy, especially in a channel with 5 or more active participants in conversations. Try taking your time to make intelligent points and either people get bored with you or your points get lost in the scrollback.