In MY model, a defender is attacked suddenly or with little warning, under adverse conditions; escape is at the moment of the attack a low-percentage possibility. The purpose of combat techniques are to disable, reposition, and space the attacker(s) for the purpose of increasing the viability of escape, so that the defender can more confidently and securely flee from the scene. It is also desired that the defender be unambiguously innocent; if a situation ends up in court, the defender is still being damaged and may in fact still be beaten by their assailant's army of lawyers. Carrying a weapon is a matter which can weaken one's stance in a court battle, and I don't want to go into a fight that I don't know for certain that I will win.
I do not, though, presume how committed the attack is. Murder and assault with a deadly are scary enough that many attackers might forego those in favor of lesser methods that you still do not want to calmly receive in hopes that their plans are not serious.
Because my goals are based around mobility and positioning, assuming superior force on the side of the attackers, my tactics are affected. I use thrust kicks to create space, I go to the floor a lot to be prepared to be mobile on slippery surfaces or if the fight starts with me being thrown or pushed, I do not even attempt to control an attacker who is going to the ground, and I really don't much bother with weapons.
Chris's model, however, seemed to me from the description given to be preceded with a negotiation phase, and in failure, shifts to a committed, two sided combat; this may in fact be a reasonable model given different circumstances, but it still would be that; a model of a fight.
...I believe that nearly all fights where a weapon is not justified in self-defense can be completely avoided.
.. I'm not interested in engaging in fights where I'm not truly forced to defend myself or a protective charge. In situations where I am forced to do that, a weapon is now justified (..and..) automatically justify the use of weapons and also of lethal force, legally speaking.
The idea of choosing to remain unarmed in circumstances where lethal force is justified is pure Darwinian stupidity to me. For anything less than those circumstances, I won't be fighting anyway, so it doesn't really matter whether I'm armed or not.
He seemed to be discussing how these considerations had changed what weapons he was training. Certainly the LEO's seem to prefer grappling and the like which helps them to restrain a target in an environment favoring them, so that they can make an arrest; this affects what they train.
Can anyone else think of what sort of model they work with, and how that affects their training goals?