I can defend my side but others have already done so, it just seems that you refuse to accept that it can work. This thread was originally about how to convey shot speed accurately to another person. It can be done if the 2 people practice a number system and both are adept and familiar with it. I also agree that once you get down to less than 1/2 of a table speed it would be very hard communicate that speed to another person. I can shoot shots that are 6" long cue ball travel shots but only because I practice pushing 2 balls that are very, very close to each other up the rail making completed shots for safety practice. Most people dont even know you can shoot a shot like that because they think they will double hit the cue ball, but I discovered the cue ball moves away from the cue faster than your stroke speed. But I cannot convey this speed to another person. Lag speed=yes, 1 1/2 table lengths=yes, etc.. it is the very short travel shots that are difficult to explain. Now if someone tells me to hit lag speed or double length lag speed I can do that pretty easy because I practice it, I have a baseline that I put a number speed on and it works. Just like golfers put numbers on golf clubs that relate to distance, which I believe you said in an earlier post numbers do not work well for people because early cavemen did not use a numbered speed for how hard to throw a spear. But cavemen Im sure did practice throwing that spear and the used some type of way to memorize how hard to throw that spear. If they had numbers they probably would/could have assigned them to how hard they wanted to throw the spear.
You were doing okay up until the last part.
We have numbers NOW & Quarterbacks, outfielders, basketball players, etc. do NOT assign numbers for different speeds of full arm motions for different distances.
Also, pro golfers do NOT assign numbers for different speeds of full length swings to hit the ball different yardages. They use different lengths of swing for different yardages & they are playing for more than $1,000,000.00 at every weekly tournament.
I think THAT should be very telling. If full length swings at different speeds was the best method for doing that, I am rather sure that that would be how they would be doing it given the money, year long exemptions to continue playing, qualifying for The Masters, the prestige, & all that.
I have a question for you. Are you using a full back swing & full finsih for all of the different speeds that you want to hit other than less than lag speed?
Best 2 Ya,
Rick
PS It is like Duckie said, it is contrivance in order to have something to teach related to that subject.