Context?

Alright so most of us are fresh off this semi aggressive set of threads I recently posted concerning my martial arts system, me, more me and what the true meaning of mma is. Seems Kave and I went about six or seven rounds to my reckoning before I tapped out and said ok MMA means MMA. So context has been on my my mind today, what is so special about context...Idk but maybe we can figure it out. Lets take the phrase self defense training as our example, there are many forms selfdefense training comes in so what could we conclude is effective self defense training.