Not to put too fine a point on it, but I recently saw a "definition" of political correctness that came pretty close to the mark:

PC:
"Advancing the proposition that it is entirely possible to pick up a turd by the clean end."

I would also propose that veritas is not served, in the main, by such filtration of thought and speech. It is not unlike the making of wine. Too much fining and filtering removes the heart and soul of the finished product. The result, in the words of the late Ernest Gallo (of Gallo Wines), is a product whose main distinction is that it is "designed to offend as few as possible."