That's an age old question that can't really be answered.
The way I see it, the the basis is if you buy the idea or not.
After that there is a gear element, a training/skills element and a life philosophy element, which all require continual refinement with (in my mind) no clear end point or point of reference for knowing if you've made it or not.
I think that's the one of the reasons that a lot of DIR divers in the mid 90's were constantly making the comparison with "other" divers. In fact, I think they were trying to define their own identity but it was badly misinterpreted and taken in many cases for arrogance when it wasn't intended as such.
Add to that that the truly arrogant ones couldn't stop spewing and the fight was on... which, answering Catherine's question, is the legacy that lead us to having tight reins in the DIR forum on Scubaboard. It may not seem like such a big issue today but the "holding apart" of the warring factions was absolutely necessary.
R..