I don't trust any of the actors in an altercation to exercise superior judgement. What's reasonable about an altercation that escalates to somebody dead? But just for grins here is a situation that happened to me last week and where SYG made me wonder: I'm at a bar with 2 friends when a visibly angry guy comes up and begins shouting at my friend. He doesn't know where this came from and made that known. The guy persists, a buddy joins him, and they call for us to step outside to settle it. None of my buddies were in a mood to fight nor had we been convinced we needed to. That's where things should have ended. But a third drunk buddy joins, goes after the original target, and now we're all three in a scrum. Bouncers come in and everybody gets kicked out. Now there are six of us in the street. What happens now? Can somebody start shooting? Both sides had reason to fear the other so wouldn't the first guy to shoot be able to explain away their actions with SYG?