Joe, the other lesson that was hard for me to accept; you can be 100% in the right, go to the room, and lose. Once you're in the room, you've surrendered control. That was what led me to be so proactive about avoiding a situation like the one you describe. As you can see in this thread, recollection is fallible, stories can be difficult to sort out, and perspective changes everything. Know your rules, sure, and like Mike says, be prepared to obey and enforce them. But also listen to the little voice in your head that says, "don't go in there, Skipper."