There seem to be people here who have quite a lot of knowledge on various subjects. So I'll ask a legal question and see what happens. (This is in relation to plausibility for my fiction; I won't be relying on it!) In British law:
I am aware that the standard for response to physical threat is "reasonable force" which I understand to mean, using an example, that if someone attempts to punch you on the nose then a similar punch (or a damaging martial arts move or similar) is reasonable force; disembowelling him with a katana is not. (Yes, I know carrying the sword in the first place is unlawful!)
Scenario: Very highly trained, unarmed, martial artist being suddenly attacked with knives by three people who aren't actually all that proficient in their use. How much damage is it considered reasonable to inflict in the course of self-defence? And does the situation change if the martial artist is defending someone else? Related to that, how about disarming one of them and using the weapon thus gained?
I am aware that the standard for response to physical threat is "reasonable force" which I understand to mean, using an example, that if someone attempts to punch you on the nose then a similar punch (or a damaging martial arts move or similar) is reasonable force; disembowelling him with a katana is not. (Yes, I know carrying the sword in the first place is unlawful!)
Scenario: Very highly trained, unarmed, martial artist being suddenly attacked with knives by three people who aren't actually all that proficient in their use. How much damage is it considered reasonable to inflict in the course of self-defence? And does the situation change if the martial artist is defending someone else? Related to that, how about disarming one of them and using the weapon thus gained?