Invalidating someone else is not merely disagreeing with something that the other person said. It is a process in which individuals communicate to another that the opinions and emotions of the target are invalid, irrational, selfish, uncaring, stupid, most likely insane, and wrong, wrong, wrong. Invalidators let it be known directly or indirectly that their targets views and feelings do not count for anything to anybody at any time or in any way.

You already beat yourself up for enough things that aren't your fault. People who care don't want to add to that." He paused, and then added gently, "But you assumed it was about you." I finished the beer and sighed. "Arrogance," I said."I feel stupid." "Good," Michael said. "It's good for everyone to feel that way sometimes. It helps remind you how much you still have to learn.