(Whoever downvoted the parent: Consider whether your goals would have been better served by downvoting Punoxysm's original question about "Socratic Judo", rather than this which looks to me like a pretty clear explanation of what s/he means by that term.)

To me, the immediately obvious answer to B's last point is "Huh? Whatever makes you think I agree with that?" and I wouldn't have thought that's a very unusual response. But I'm sure it can be done more subtly.