Fair dos..point taken. Have you seen my earlier comment wrt a bright red permanent marker?
Theres also some study into an armed person v a knifeman and needing at least 20 feet to defend himself...cannot remember the details...someone (other than I) will have to google if they require clarification.
It is FBI research into how long an officer would take to draw a firearm and successfully shoot and stop a charging assailant with a knife*.
I have read interesting research that at close quarters US police are actually more vulnerable to edged weapon attack because the default is to attempt to draw a firearm.
This is why fighting systems working on a "flinch defence" are argued to be more effective, they built on the body's natural "Oh Shit" reaction. So when the conscious brain can actually kick in and build on the natural reflex, the immediate attack has been blocked and can then be built on.
Action will always beat reaction, and when you body's natural response is built upon you have some efficiency in upping your chance of survival.
When I first went through my Officer Safety Training, I was taught I was going to get cut. Just accept it. The trick is to make sure you survive the cut and shock and can survive the confrontation.
I'm certainly not Jason Bourne, and my whole career was unarmed.
However, I never went higher than DC and I acquitted myself with more presence of mind (and have taken on people armed with knives) than this alleged leader of men.
Who, if he were a more junior officer, I'd expect to have been stuck on by a Department of Professional Standards who equally have probably never seen an angry man in all their life.
*Same research said the average US Law Enforcement shooting takes place at seven feet distance.