I just dont understand why you guys are stretching this matter unnecessarily. If he isnt going to agree, no matter what you say, he never will. So, leave it at that, there is no need to prove anything to anyone. Just move on. I have already seen members explain the same thing multiple times. Initially i also explained it once but if the other party is adamant about not agreeing, its better to stop the conversation and move on to another topic, which is exactly what i did.
My views align with what most members are saying but i would suggest both parties end the conversation even if you dont agree with each other. There is no need to write long, detailed explanations repeating the same points over and over again.