This is true also; especially in one on one relations, I know many who will never be swayed no matter what the facts. Their families have basically disowned them due to their intellectual dishonesty and inability to keep their yap shut and be polite at family gatherings.
I also know many in the middle who just are not interested and don't want to be bothered. Snap decisions about topics they are not personally interested in is all the time they are willing to devote to understanding an issue.
Family visits with my wife's sister and her husband from Denver are very interesting times. Completely different world views.