I agree with almost all of the posts on this subject, but I have a problem with some of the terminology. The phrases "fight dirty" and "fair fight" should not
be allowed into this conversation. When you are fighting for your life, nothing is "dirty" fighting, "fair play" has no place in it, and I resent those terms being used to describe a life-or-death struggle.
The bottom line is that you do what you have to do to stay alive, period.
If that means ripping the guy's jugular out with your teeth, you do it.
I could get more graphic, but the point is, to stay alive, you do whatever is necessary at the moment.
There are two sides to every story, but in a life-or-death fight, the loser
won't be around to tell his side of it.