The old co-dependent training manual says that you have to agree with everyone because if you don’t you’ll upset them, hurt their feelings, or offend them. The old training manual says that there can be only one “truth” and you are either right or you’re wrong and you do not want to be wrong, because that means you’re stupid; but you should be willing to stifle your truth and play dumb or agreeable if holding fast to your perspective would possibly make anyone else feel dumb or anger them.
In this case you should pretend that you think you’re wrong but really believe that you’re right and begin to carry resentment towards that person and distance from them emotionally if not also physically. In the co-dependent manual you are being bad if you assert your beliefs or rights, regardless of how respectfully you do it. That’s not exactly a recipe for fulfilling relationships with yourself or with anyone else. But it’s in the manual so you have to do it. Or do you?