I don't think the issue is whether or not people are more or less rational now than in previous era. The issue, from my view, is that people are just as irrational as they've always been, but the consensus facts of reality are suddenly up for debate.

There's a new marketplace of facts supplementing the marketplace of ideas and the combined effect is catastrophic.

When I refer to post-truth or transpostmodernism or whatever, I'm not talking about people who have arrived at different conclusions based on the same facts -- I'm talking about people who have based their conclusions on opposing, contradictory facts.