Is it ADHD, or something else, that results in the widespread inability nowadays to keep two mutually-contradictory-yet-both-true viewpoints in your head at the

Is it ADHD, or something else, that results in the widespread inability nowadays to keep two mutually-contradictory-yet-both-true viewpoints in your head at the same time? Or a set of pros and a set of cons? Almost everything in reality is of a mixed nature, so what makes people want to believe a false model of reality where everything is either good or bad, and must be sorted neatly into one or the other category immediately? Is it a need for certainty? For being right? You will find a shortage of both in life.