If postures merely meld into one another, blurring one form into the next, then it is dance.
No one's talking about blurring. Don't know why you brought it up.
Paul Dillon moves his feet during posture transitions and is rooted at the point of application delivery, be that a strike or a Chin Na lock. And that is as it should be.
That's what I was talking about. Paul doesn't JUST move his feet during posture transitions. There was movement where there didn't need to be. His back heel lifted off the ground at various times - at the wrong times. He even turned his back foot on his heel.
In our LHBF, I would say we are also "rooted" at the point of application delivery. It's just that, because that's also the point we move onto the next posture, you don't see it distinctly. And maybe your idea of where that "point of application delivery" is different from ours. I would say wrong as well, which I will explain later.
I don't see the point of drawing out the rooting at the point of application delivery, at least in LHBF.
Also, maybe your idea of where each "posture" is in LHBF is not the same as ours. Our change in "posture" can be as small as changing the stance from bow to 4/6. If you look at my video closely, you see that correlation with foot turning.
Also, LHBF philosophy places more emphasis on the change of posture. Application delivery should actually happen more on posture changes than at the end of each posture. Scientifically, change in velocity means acceleration. Only with acceleration can you have force. If you are applying anything at the END of each posture where there is negligible change, then you are not getting any useful force.
Let me quote Kumar Frantzis on rooting "The technique of sinking body energy and rooting into the earth. It is difficult to physically move a martial artist who has mastered rooting. In the internal martial arts, rooting gives a practitioner tremendous power". One of my teachers used to quote the Chinese epithet " A tree with a weak root will soon be blown over"
Fine. Rooting is important. Although "argument by quote" hardly does anything for me.
But you have concluded without evidence other than "because you were taught this way" that LHBF must root like Taiji. That's simply not the case. If your LHBF teacher used Taiji rooting in LHBF, then I'm afraid he wasn't teaching you LHBF.
Your quote does not say that rooting should be carried out exactly the same way across all internal arts either. From where I'm sitting, it seems like you're judging whether someone is rooted purely on whether or not their foot is stationary. For you, it seems like a foregone conclusion that there is no way to incorporate rooting and foot-turning into one. I'm here to tell you it can. And we have. And it is essential to LHBF.
I am afraid that we may never agree about this and that is OK. So long as you and your students are happy with what you are teaching, then no one can argue with that.
The thing is, I show them BOTH the feet turning versions and non-turning versions of each posture and all of them agree that the feet turning provides more power. I try each posture on them and I let them try it on me. Their recognition of the fact is clear. From where I sit, it seems you are only reading and not trying it out for yourself. That doesn't help anyone.
I have tried not turning my foot. The power is not as tremendous.
Again, I invite you to post video of yourself so I can see what you are trying to say clearer.
Watch again the Chen Zhenlei clip and you can see this process quite clearly.
What I saw in the video is that during the transition from a 4/6 stance to a bow stance, his back feet didn't turn, which resulted in his body being side-on to the direction of the force. In LHBF, the torso should be directly facing the direction of the force. This is the reason for the need of foot turning. Different philosophies lead to different movements.
Another thing I saw. In the first stance change where he moves onto the right foot, it didn't seem to be driven by a push off the left foot. Maybe it's a different philosophy in Taiji, but in LHBF, all stance changes are foot driven.
The next thing I saw is the single whip. His front foot is on the ground. Then he spends quite some time to actually get the "whip" out. I say this to contrast LHBF philosophy. In LHBF, we would have the foot plant and the "whip" happen at almost the same time. We would also have our torso facing the right of screen.
The next thing I saw after that happened at around 1:50 into the video (it looks like he was doing the first "brush knee" of the form). His back foot TURNED. And on his toes. Where the back foot turns is a different philosophy I would reckon. But by your assertions, his back foot shouldn't have turned. And it was there.
At 2:19 where he was throwing the first punch. His back foot turned AGAIN just before the actual punch. Not good in LHBF books.
Overall, his lower body moves well, but I would say it is exactly the style of rooting that causes his upper body to be disconnected from the lower body. Basically, his arms are moving solely by themselves. Not allowed in LHBF.
Overall, where his foot turns, conversely in LHBF, we would have those areas as "application delivery" as well. Which would mean we turn the back foot on its toes.