Agreed. Without familiarity with the argument upon false premises it is difficult to repose effectively. In fact, that rejoinder must be built upon an inviolable and immediately obvious physical foundation. It's why I appreciate living among leftists in the People's Republic of Santa Cruz County, CA.
Yet in the face of such evidence, the response is likely to be either denial, obvious dishonesty, or simple avoidance because they suffer from the fear of retribution by even more ignorant fellows. This is where repetition in the face of empty space becomes necessary, and a real expression of courage. Sometimes events present an opportunity to get under that skin. At that point one must leap, but not too hard, with which to build upon those repetitions.
It's a long slog we face.
(Carry Okie: What’s your favorite song?)
Pat Buchanan told a story. When Nixon & Kissinger were going to Beijing, Nixon’s press secretary Ron Ziegler was asked by a reporter on the jet, “Have you ever been to a communist country?”
“No, but I’ve been to Massachusetts”.