"But HE did it first, Mom!"
Rob, believe me, I'm well acquainted with Buck's "argumentation". I have been there and done that, as have many others. But if you view it as outrageous that he would co-opt a phrase and redefine it for its own purposes, can you see that you and your camp are doing, if not quite the same thing, something along that spectrum? You too claim ownership of terms. You claim that you own the definition of what is "internal strength", and assert that no one can possibly have it who hasn't drunk your kool-ade...and hey, it may be fabulous kool-ade, but that's not really the point. The point is that while Buck is serving up who knows what and smiling and saying, "My kool-ade is just as good as your kool-ade", you are yelling, "We are the only kool-ade stand in town, and the rest of you are NOT SELLING KOOL-ADE!" Honestly, it's enough to make a person stick to plain water.
As a martial term of the art, "內勁"has a pretty specific meaning of internal strength. The term internal strength when applied to martial arts in general has a fairly specific context in which it is used and which has existed as a term of the art for several centuries (at least according to Wikipedia).
As pointed out earlier, Phillip is referring to a different concept of which we have other more appropriate words in the english language to describe. If Phillip had selected a different word then perhaps this discussion would be in a different sub forum.