I’d suggest you guys (lmf, Max) use a discussion tree for this discussion. I’d specifically suggest one with only the main points, not to cover everything that’s said. You can each write specific text that you want to include in the tree, and make it short (typically one sentence), clear, and something you’d stand behind in debate. Then only the text intended for the tree gets put in the tree. One result is it helps focus attention on people’s main points (the ones they put in the tree). Another result is the tree shows what points haven’t been replied to.