Consider a verbal fight within a couple. Everyone wants to have the last word and both throw loudly anything they can come up with at each other. In such a situaiton you may be able to break that mental stance of your opponent by "simply" shifting the topic/perspective to something, they did not expect at all. This way, you may be able to force you opponent to give up the trench they dig themself into.

I know its not simple. This is more education than superficial conversation.