I agree that a society with rational discourse is clearly the best option, and that this is an extremely difficult problem, notably because everyone likes to think that they're rational. We're always going to be subject to external inputs that change how we perceive reality and the world around us, and not always in a rational way. Some people recognize the value of reason, and make it their business to exploit it, while others recognize the value of reason but fail to acknowledge that the world they live in affects their views and perception of reality, and a third group recognizes the value of reason but sees their identity as immutable -- this is the most dangerous group, in my opinion, and a group I regret to say I've been a part of.

My point is only that our opinions are swayed and altered by propaganda, media, and the world around us in general. To say an opinion has been 'corrupted' is a murky concept to me, because I'm not sure how much of our opinions I believe are original, and what corruption actually means in this instance.