When would it be justified that one human hit another human?

[SuperNova]

Teeqoz said:

SuperNova said:
Just send the next text with: ' Sorry. Wrong number. This is embarrassing.' or something like that.

There. Fixed. I really don't see the big deal here.

And no. Obviously this does not warrant a broken nose.

To the question in threat title: The only time it's truly acceptable to exert violence on another human being is in self-defence.

Not in "other person"-defense?

Within reason also in other persons defense. If someone is unable to defend themselves and violence is your last resort to diffusing the situation then yeah.

I'm obviously not saying if you see, for example, someone being raped you should just walk away and not help them, etc...