If you look at the aspects Of what Bruce looked into as to the different Martial Arts Boxing fenceing Ect, Yes He did But Not to take and train. But to understand see its usefullness See how JKD could defend aginst this or relate its method for performance. Now yes with more avalible these days you can look at these arts in concepts That Dan uses. Then train in Jkd And have a rounded way that you have exposed your self to other methods found that in your JKd you have methods that assert there self to defend and use. if confront with this type of offence. Is it JKd NO is it explored concepts yes Can it help yes. But do you have to train in JKD in this manner NO But if you choose to thats great its you making the choice. At least you have the exposer. Jkd was not along drawn out training It was about a 2 year devolpment training then of course you had to liberate from the training through the open aspects Spars that brought out just what you could get working Now i would not go as far to say Dan is the only valid source for JKD. You can not go wrong seeking him out and learning all you can from him. But other sources are avalible. This kind of stuff keeps the politics going who is better qualified and who is not. James Lee had several students Bruce shut down the scools James still instructed. Taki has too. niether James or Taki certified anyone For sure. James passed away before Bruce. But the students still lived. Taki did not want to certify people Dan had a large burden he shared when he certified the remaining Back yard group. They have there ways now. People from other style of many M/A arts over time have gone on after there instructor. Founder passed and left some one the rights. To seperate and teach the same art just a different organization And they were not given the right by there founder or head of style after death. But they had good training enough to instruct. Bruce left No person incharge or told no person As I know of that if he died they would head up JKD I respect Dan very much as Most any other person does. If an instructor can trace back to one of the three phases of Bruces Jun Fan // JKd Then dont they have a piece of the pie.