I'm not so sure about that. Go into any political thread here on HN and observe the amount of on polar opposites of an issue, while most everyone sincerely believes that they are arguing on "the facts".
Just one example:
U.S. to leave global postal union next month barring last-minute action
https://news.ycombinator.com/item?id=20965145
And this is conversations among smarter than average people, it's no wonder discourse is breaking down in the political realm resulting in massive polarization in the public.
I think there's something about the massive increase in information people are consuming due to 24 hour cable news and the internet that's at the root of the problem, is it perhaps overwhelming people's ability to think straight? Maybe we never even evolved to handle this much complexity.
I think it's something like.....the world is infinitely complex (infinite dimensions), so the mind must compress and simplify it to make sense of it. In doing so, it compresses it into a smaller set of dimensions, but with the increase in independent thinking due to members of societies having less in common (we don't go to the same church, we don't even watch the same TV shows, we don't watch the same evening news, etc), people are compressing things into different dimensions - two people consuming the same information will view it, store it, recall it, and discuss it completely differently from each other, while at the same time be under a completely transparent illusion that they each see "the truth". This has always been the case of course, but 30 years ago life was much simpler - lots of people barely followed the news back then, you had to make a serious effort, but nowadays it takes effort just to avoid it.