Perhaps if we just think in terms of fighting and the training for fighting (as Lee would say, in it's "suchness"), that may provide us with an answer.
So that would mean pursuing the truth in combat. When you discover that truth, isn't that about the only thing that really matters? If you get in there and actually "fight" with your art, then I think you'll have your answer. You won't find it in a book or discussion forum, that's for certain. And by fighting, I mean that in ways OTHER than street fighting (Dog Brothers, MMA-style sparring, etc)
I think it's important that we practice and live as Lee would have advised us to do; by absorbing the useful and rejecting the useless. In that regard, there is only one way to find and that is be pressure testing everything.
When you do that and find you can pull off stop-hits, kicks, compound trapping and the like, you've found the truth (JKD). If other things work equally well, that is still truth, isn't it? Isn't that the only thing that matters?