Back in the day when I knew all of the rules and was full of piss and vinegar, if a coach pulled out a rule book, he was questioning my ability to umpire that game. He would have been in the parking lot as soon as I saw it.
Now in my older, more wisen (is that a word?) state and thanks to this forum, I allow the coach to ask his question and I answer it succinctly and tell him I will scan the relavent sections of the reference manual to which I refer and send him an email.
I had a friend that would bet the coach $50 that the coach was wrong and the assigner would be the arbitrater. He got an extra $200 that season.