Anyway, the point is not Code Geass. The point is more general: conversations are more interesting when you entertain other people's ideas. Even if they're wrong. I think homeopathy is bull, but it doesn't stop the fact that the conversation about homeopathy is more interesting if I engage in it rather than just just blindly saying "No, you're wrong".
No offence intended to people who use homeopathy. I just needed an example for the sake of argument.