This discussion has been very instructive. It is a lesson that has to be learned here over and over again. From the point of view of the participants, debating with someone who's making effective rebuttals is little different from debating with someone who only thinks he's making effective rebuttals.
When both sides accuse the other of not comprehending the arguments, then what? Naturally, moderators who understand the topic can step in, but the side deemed to be uncomprehending will naturally claim bias.
As long as the participants in this thread find the current situation acceptable (to me, it resembles an impass), I see no need for moderator action, as it would likely cause one side or the other to go off in a huff, thereby ending discussion completely. I encourage both sides to become more imaginative at trying to educate and persuade the other side.
There
*is* one improvement I would like to see. I would like to see a cessation of accusations of dishonorable behavior. I
*will* step in when I observe it happening, and the consequences will be immediate.
--Percy