Like it or not we don’t bring emotion into any event or conversation it is there already. It is the elephant in the room no one wants to talk about. Sadly we are very comfortable with logic and reason. We have rules to control that and it is separate from us but emotions live within each person.
So, an invalidation is an emotional response from the most regal and logical person even if they are oblivious to it. That is the key to beginning to negotiate and defend yourself.