My policy when talking to others about matters where I have some expertise is to refuse to “pull rank,” so to speak, and to refuse to suggest that the other person can’t see the truth because of some personal fault. I never say, “well, I have a Ph.D. in that topic so I know more than you,” and I never say “you’re blind to the truth because of this bias you have.”
Both of these types of rhetorical devices direct attention away from strengths and weaknesses of the arguments at hand and turn attention instead to the persons arguing. I’d rather stay focused on the argument than make it personal.
Why, then, am I surrounded by people who have no difficulty in stooping to this level of argumentation? It’s tough to talk to people about the facts when they are dismissing everything you say as a result of your brainwashing.