Send him here, I may not win but will take the challenge. This is assuming he is not one of those that thinks he is right and nobody is convincing him otherwise, inspectors are just as human as installers is the first thing he needs to realize or there is no point in even starting any debate.
I've seen inspectors that would literally come unglued when seeing such a thing, and I have seen inspectors that would maybe say "Ok, we need to look more into just what do we have here", instead of just lashing out on their first impressions.
Having a poor attitude about it gives me even more motivation to try to prove him wrong, even if I thought I was leaning toward his opinion before he erupted.