“Here’s the simple litmus test I use: if there’s communication going on—if the other person is talking to you, even if it’s aggressively or insultingly—you’re still in social aggression mode, which means you should run away, or use your social skills to negotiate your way out of the confrontation. If there’s no communication, or the other person is already in the process of taking physical action, and there’s no available exit, the situation is asocial. You’re facing imminent grievous bodily harm and your only option at that point is to fight back.”