I try to follow, very imperfectly, a couple of guidelines with respect to these sort of threads to maintain my mental health.
One, if I have stated my position fully and bluntly at some point, I am OK with letting the other guy have the last word once the exchange is wound up. The final say is not necessarily the most compelling.
Two, I do not attempt to change anyone’s mind or get anyone to cry uncle, because ultimately I do not get to pass or fail a challenger. I try to direct myself to a reader following along, who’s position may not yet be set, and above all, to clarify my own thinking. If I have a defensible position, I feel I should be able to express it.
I will take this opportunity to observe that Rum’s posts are usually substantial and relevantly engaging, and I do appreciate his contribution to the forum as I have learned a great deal by them.