The most pernicious form of relativism is that practiced by certain conservatives, who believe that historical facts are "opinion", and therefore we're free to choose the history we like the best. In that case, the argument becomes.
A) They did mention something about the brutal exploitation of labour in the late nineteenth century in school.
B) I also heard about the great captains of industry of the Gilded Age.
C) It's all relative; I'm free to choose my history.
D) America is the greatest country in the world; a moral beacon and a shining example of what the republican work ethic can do.
E) Therefore, A) never happened, for otherwise there might be a reason to those unions, that stand for inefficiency and obstruct the way of profit.
You can't argue with that.
My opinion, of course, is that republican aliens colonized this planet in 1960, and shaped every current republican in their own image, from donkey manure and horse testicles.
