skribs
Grandmaster
What is "authentic"? Who decides what is and isn't "authentic" for a martial art?Thanks everyone for your comments. The main takeaway that I learned here, is it is considered nowadays 100% OK if a school advertises teaching a martial art even if it is not authentic or the vaguely the same as what is being advertised.
Your position is more about boxes. You've placed martial arts in a box. You've decided what you think an art is. And if an art isn't exactly what you think it is, then instead of adjusting your assumptions and saying "this is also the art", you just say it's not authentic.
To use your example above, there are styles of Okinawan karate that feature grappling, including take-downs and ground-fighting. Someone who trains that style and sees a school that only teaches the grappling might see it as a specialized school that focuses on grappling. You look at it and say "It's not authentic Okinawan Karate, it's BJJ."