"Knife fights" are Hollywood fiction. After seeing hundreds of knife incidents I have learned one thing for sure everyone gets hurt, logo or not. Run like hell and call the police.
No doubt. I have a "friend" who is a point man on a privately contracted "team", and he uses a knife a fair amount -- but only against someone with a gun (close range, usually before the gun is drawn), and he will use a gun against someone with a knife. Seems to work for him.
We need a 5/16" (or thicker) SR-77 BOWIE!!! (Written back in early '07 -- Regulator Premonition?)
