text:  And last night CNN decided that they would show everybody their special rules for the debate. Because, you know, you can't just watch the debate. You can't just have two open microphones where two people go at it like they're supposed to. No, no, no. There's got to be all sorts of rules and stuff. So here's CNN's tutorial last night for the debate. If we go behind the podiums, you can see two green lights. When they're on, they signal to the candidate his microphone is on.