Exactly, Dave. The vertical plane you mention here is exactly what I was describing last night in my post #1001 on "my concept of the CTEL." When users talk about the outermost edge or rotating edges, they must just be referring to viewing that plane, or a line in that plane, from a slightly different angle (the "vision center" isn't in that plane).
After last night's discussion in this thread with Stan Shuffett, I was thinking that I might start a new thread titled something like
"CTE Conflict Resolved." But I think I'll do it less dramatically right here and now. I apologize for this post being so lengthy, but so has been the journey.
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For a long time, we seem to have had two camps of people arguing about CTE. It has been a divisive debate, with people from both camps sometimes hurling personal insults.
I hate using the terms yeasayers and naysayers, or proponents and opponents, because I think some people on both "sides" were trying to do far more than just cheer or sneer. Most people on both sides, however, agreed that the method works in some fashion. The key issue was "how does CTE work?"
Some seemed to feel that Hal Houle and Stan Shuffett had discovered geometric magic -- that when you simply sight, offset, and pivot the forces of table architecture and numerology just compel the OB to drop in a hole. Others, more logical types, analyzed Hal's and Stan's teachings and concluded that manual CTE, for any given CB-OB distance, is essentially a discrete, or x-angle, system that, if performed strictly in accordance with the given instructions, cannot produce enough cut angles to play proficiently. Since some people
do play proficiently with it, that meant, to those logical thinkers, that modifications, or adjustments, or "visual intelligence," or "feel" were/was being introduced somehow. But they did not know how.
Last night, some of the usual combatants were discussing two shots from Stan's DVD that Stan said required the same set of instructions for each shot (i.e., the same choice from the menu of 6 sets of instructions for cutting in each direction), despite one of the shots being perfectly straight and the other one being a cut of about 20 degrees. Then Stan entered the fray and said the following:
I then asked the following:
Stan responded, in separate posts:
I take this input from Stan as revelatory. He is acknowledging that the basic set of prescriptions, if executed precisely the same way every time, would create only a small number of cut angles for a given CB-OB distance. So that issue should be settled. What, then, creates the additional cut angles; what turns a discrete method into a continuous method -- one with enough cut angles to pocket all shots? Where is the "feel" being introduced? Stan has now answered that question -- it is
different eye positions for the
same set of visuals. In other words, for any particular shot and alignment-menu choice, such as this:
CB-OB distance = 3 feet
cut to left
secondary alignment line to "B"
bridge length = 8"
cue offset = 1/2 tip
pivot from left to right
multiple cut angles can be achieved by viewing the CTEL and secondary alignment line from different eye positions.
How does one know where to put his eyes? It is knowledge gained from experience. Stan did not acknowledge that this is "feel," but I'm sure many of us would view it that way, as feel in any aiming method is developed from experience in using the method.
So there we have it. Stan's manual CTE depends upon utilizing multiple eye positions within each of the basic 6 alignments. The feel or additional knowledge is not introduced by varying the offset, or by varying the bridge length (beyond what Stan prescribes), or by fudging the pivot -- it comes from knowing where to place the eyes while still somehow holding to the underlying pair of visuals for each of the prescriptions.
I hope this really puts an end to the squabbles. Manual CTE is not some voodoo hocus pocus. It is not geometric magic. There are no supernatural powers to align-&-pivot methods. It doesn't work because of numerology -- the table being 1x2 or 90 being the sum of 45, 30, and 15. It works by utilizing a small number of reference alignments that the player has learned to fine tune based on his explicit knowledge of where the pocket is and the appearance of the cut angle needed for the shot, i.e., his experience-based knowledge of the shot needed.