The actual law of physics is that for every action, there is an equal and opposite reaction. One of Newtons's 3 laws of motion. The actual direction of motion of the cue, at the time of contact with the CB, does matter. I believe what Dave is saying is that it is irrelevant what is done prior to point of contact or after the point of contact if the direction and speed of of the cue is the same in all cases. I believe the debate here is what type of stroke is able to deliver the cue tip to the aim point at the desired speed most consistently. One way to accomplish that is a fundamentally simple, consistent stroke. Another way is to have savant type of natural skill. Ask Lee Trevino or Jim Furyk if they needed better fundamentals. But that doesn't mean Joe Sixpack has a better chance of making the pro tour by trying to mimic their swings.
If one were to compare the impact postitons of Lee Trevino & Jim Furyk to hundreds or even thousands of other Professional Golfers you would find them to be in the 'same' positon at impact, fundamentally sound. It is not how one gets there that matters, but
that one does get there that counts.
I respectfully disagree with your interpretation of the 'discussion' at hand. I 'believe' I was trying to determine if two(2) different paths
during contact time might have different effects as I
think that they should.
In this instance, I am
not interested in what is the
most simple for most people. I'm interested in
what is the most effective. Everyone on this sight is not a novice. I have been playing at a fairly high level for 46 years, about 20 with an astigmatism, and have ruptured a disc in my back 2 years ago. If there is a better way, I am willing to give it a fair try, but not just because someone tells me it is better. So far, I have not been convinced & I certainly do not 'feel' that it is any better than what I refer to as the 'piston' stroke or J stroke.
To me, straight to & through contact time, would seem to be more effective than an arc moving downward during contact time. They are different. What is percieved to be insignificant or negligible to one may not be so to another.
Two examples:
Ray Floyd dropped a club off at the trailor to be re-gripped with instructions of only ONE(1) layer of tape under the grip. The tech apllied two, just to test him. As soon as he put his hands on the club he said in a bit of an upset & disappointed tone, 'I told you I only wanted only ONE(1) layer of tape.' He coud feel with his hands the thickness of ONE(1) layer of tape
John Havlechek was warming up & informed the equipment manager that the rim was a 1/4 inch too low. The manager thought he was kidding, but John persisted. The manager measured the rim & it was a 1/4 inch too low.
As you have inferred in another post it is what is done before contact that affects what happens during & after contact. Does one(1) mm or 1 degree in the wrong direction make a difference? Can what happens over the course of 1/8 to 1/4 inch during 1 to 2/1000 of a second make a difference? Ask that question to an eye doctor doing Lasiks surgery.
Do certain pros place the tip where they intend to strike the cue ball & then strike it there? The answere is no. They place the tip, or practice stroke usually low & strike higher. They have their reasons.
Certain experiments are done under certain perameters. Change any one perameter & one may get a different result. I have seen some very conclusive information from Dr. Dave but he made an ammendment to a statement just today regarding english. If anyone thinks they are infallible, they will one day have a very enlightened awakening. I'm not talking about Dr. Dave. He seems to be a very reasonable man.
I hope this clarifies some points.
Sorry for the rant. No offenses meant. I sincerely hope non are taken.
With respects,