Can't keep track of how many times I've dealt with that on social media, in particular this site and its sister site SLUG. Leftwing extremists dominating the former, while rightwing extremists dominate the latter. Even when I present sources that are credible where factual reporting is concerned, and the conclusions said sources arrived to would be hard to argue with, I'm still met with denial.

The truly amusing folks are the ones who claim they trust the Government and that they desire for the Government to have more say in running things in society, get upset and defensive when I present them with Government sources (websites) that might contradict a certain narrative they wish to be true. Tinfoil hat quackery on both sides of the political aisle.

It was my understanding that "cognitive dissonance" was holding two or more contradictory beliefs as true, at the same time, causing a kind of mental anguish, that usually manifests in irrational and/or neurotic behavior(s) or some kind. This kind of thing is most common in religious persons, although it is possible for anyone to suffer from it.