I didn't. At least, I don't believe I did. The GP was consistently ignoring the salient point that I and others repeatedly made; instead pursuing the same line

I didn't. At least, I don't believe I did. The GP was consistently ignoring the salient point that I and others repeatedly made; instead pursuing the same line of attack as if we hadn't pointed out the inconsistency. Hence, it seemed to me that he was not interested in engaging in honest dialogue, so I pointed to his approach to the discussion. There was no personal attack.