I have always had an innate fear of edged weapons in the hands of someone I do not trust. I also have acquired a large number.
In one Roman battle, something like 100,000 men died. Edged weapons can most certainly be lethal.
I’ve heard from cops that they’re more leery of an unpredictable suspect with a knife than one with a gun, within closing distance. There are more ways to disrupt a gun than a knife.
Edged weapon lethality.
It’s zero at 20 feet, and that is my intrusion limit.