I was at a conference kindly hosted by Google, and there was a discussion there between Jeb Bush and Dan Rather on whether we were living in a post-truth society where it really didn't matter what you said, it would be accepted by a large number of people. You could debunk it and it still didn't make a difference.
We've seen a little of that recently. The interaction between President-elect Trump and newspapers like The New York Times and The Washington Post will be an interesting study over the next little while.