knife against gun,
this system is best
or that system is best.
do this or do that.
all these or most of this line of thinking is regarded by someone who is young and fit, or having trained in this art or that art.
going through the post i was remined of what i was told very long ago. find a system/method where an old lady can defeat a full able fit and armed man. use that system/method.
so what about the people who are weak in strength?
what about the people who are not able to attack like bruse lee

what about your grandma? or grand-dad?
what should or how should they take care of them selves?
what about young kids, do they or are they not under threat?