[Yoda]

A predisposition of an action or intention before Impact which will cause the Left Wrist to bend or not to bend past separation notwithstanding, I am saying this - if the physics of the stroke are identical to the point past separation at which the bend will or will not take place, the ball flight will be identical. The ball doesn't know of this predisposition, it only knows what the clubhead does to it in the Impact Interval. And it is not affected in any way, whether the Left Wrist bends past separation or not.

Let's take Couples for example. At the both arms straight position past separation, his Left Wrist is well bent. Now he could preprogram himself to swivel prior to that, but still past separation, so that the bend did not happen, but the ball flight would be the same - the ball wouldn''t "know" thet the swivel happened.

[Bold by Yoda.]

I agree that "if the physics of the stroke are identical to the point past separation at which the bend will or will not take place, the ball flight will be identical." The problem is that they won't be. You just don't hit a perfect Golf Shot and then, all of a sudden, do a bad Swivel. A good Golf Shot demands a good Finish Swivel for the Club to take the proper route through Impact. The Finish is "the Precision Destination of the Downstroke Blast-off from the Top," not just "Impact fall-out" (2-N-0).

If the Finish Swivel has not been properly programmed (consciously or subconsciously), then it will not be properly executed, and the Club will not -- indeed, cannot -- take the required route from the Top. What will be executed is the classic Chicken Wing, and Steering and Quitting through Impact will be the ineveitable enablers.

As far as Freddie Couples goes, per the explanation in my prior post, his Bent Left Wrist is entirely correct due to his Turned Left Wrist in the Grip (Strong Double Action 10-2-D). It would not be correct for a Golfer whose Left Wrist was Vertical (Strong Single Action 10-2-B).