It is my opinion that martial arts can be seen as a folk art, which implies certain things in terms of what, and how much material, make up a "system", as well as who has authority to teach it. In my opinion, as a folk art, defining the curriculum of a complete system becomes nebulous and difficult. The system is whatever and how much you know. And anyone who knows something, can teach it, particularly to the next generation and particularly to ones own family members. Any thoughts on this?