Yes, the fundamental nature of the Golf Stroke dictates a definite "Left Wrist Paddlewheel Motion and a Right Forearm Paddlewheel Motion". Executed on a Horizontal Plane, neither truly Rolls, nor do they appear to Roll. However, that same Motion -- Wrists held Vertical to the ground -- executed on an Inclined Plane appears to Roll (but it does not).
Bottom line: If the Flat Left Wrist appears to Roll, then its complement -- the Bent Right Wrist -- will also appear to Roll. Assuming a classic Grip with both Hands held Vertical (10-2-B), the Left Wrist cannot Roll without the Right Wrist also Rolling.
That's totally the way I understand it to be. Thank you.
HK spent a lot of time finding the words to explain and define those motions. I can't put them into any other words without sounding like I'm off my rocker or sounding like I'm morphing them into something else.