Why should this surprise anyone? “an adjective defined as ‘relating to or denoting circumstances in which objective facts are less influential in shaping public opinion than appeals to emotion and personal belief.’” Outsider77 is right "The media created the word and now has to live with it."

There is simply no reasoning of factual truths with the unreasonable. Which makes “post-truth” as being just one more buzz word phrase floating around as a false narrative to appease the emotion and personal belief of liberals.