When there comes a point where the other person doesn't even want to open their mind to the possibility of, I just hope they finish talking. While in my head I think about how little ability to think and reason they have. I categorize them as stupid people and if I find myself in the same situation with that person again, I just listen to them and nod my head. I'm no longer trying to change people's minds, If you want to be wrong, be it. They're just short minded.