Things change,

[ninjanurse]

At the core, imho, a punch is just a punch, etc. Outside of the envelope, things change/evolve/transition/transform/etc from what is found at the core of any martial art technique.

True.

[bushido_man96]

I think you make an interesting point, JusticeZero, and I think "change" in this instance is a better word choice than "evolve." In order to evolve, things are established and then grow from each other; like BJJ from JJJ and Judo. But with TKD and Taekyon, the level of seperation between the two is quite a bit greater; there actually seems to be a void between two. So change fits here, I think.

Whether this is the case or not with TKD, we will likely never know. But, its a good point to theorize from.