> I would have gladly had that discussion in the original context! but he did not reply to me there, nor to any of the other 6 people who replied to that horrendously incorrect comment of his

I think your response in that thread was sufficient. If you feel it was insufficient, that thread would be the correct place to continue the discussion or further clarify any misinformation where people may actually it.

People rarely admit when they are wrong and you don't have a right to (or even a reasonble expectation of) any such admission in this context. Harassing them about it in other threads is not a positive contribution to the discussion or the community.