Now I hear it used in the context of skepticism of authority, "nothing can be known as true or false" in the current political climate and it scares the bejeebe

Now I hear it used in the context of skepticism of authority, "nothing can be known as true or false" in the current political climate and it scares the bejeebers outta me. I don't understand how that aspect of PM differs from classical fallacies of appeal to authority -- and I probably never will. :( -- but I agree, it feels bleak.