Ho Hum well yes if not knowing the terminology of an art I dont practice from a country the art I DO practice isnt from then I guess I lack the basics. But incidentally wouldnt I only find out such essential information through dialogue with people who practice different arts? The very thing you say is pointless? And I do appreciate this is just an example of the terminology hang up you seem to posses but its funny how I may not know the exact terms used for BJJ students yet seemingly it doesnt present much difficulty in conversing with them... Oh and heres your three questions: 1. what is the purpose for which they train? 2. (what is) Their overriding rationale? 3. (what is) Their raison être; their esprit de corps?