@Tattie @Impossible_PhD
Big agree. I used to work in a knife shop and appealed to my martial arts training to redirect people looking for self-defense to our pepper spray. If we'd sold solid umbrellas I would've recommended that, too.
As I put it, a knife is likely to make someone die. It's *not* good at quickly stopping someone from fighting.

Range and stopping power beat lethality for self-defense. And escaping beats everything.