Geometry and JB Cases (and others, for that matter):
As AtLarge mentioned about Tony Robles being able to see the entire ghost ball, plain as day, I'm also in that camp. I can not only visualize that ghost ball, but I can actually "see" it, due to excellent 3D spacial perception that I (humbly) was gifted with.
And my ability to "see" it includes all aspects; the size of the ghost ball, where it sits on the cloth, where it's touching the object ball -- and I can do this no matter where I am in relation to the shot, no matter where I'm standing at the table. I literally can see it so clearly, that with my eyes focused on that ghostball and never taking my eyes off of it, I can reach my arm over my head, extend my index finger in a pointing downwards motion, and then bring my arm down swiftly so that my pointed-downwards index finger pierces right through the middle of it. Or, from 6 or more feet away, I can extend my cue and swiftly bring the tip down to rest upon the exact spot where the ghostball sits, no matter where I am in relation to the shot; if I gently lay the cue to rest on the table, with the tip resting on the spot where the ghostball sits, and then walk over behind the object ball in line with the shot and examine closely, the cue tip is resting upon the exact spot where a cue ball would be sitting if it were in contact with the object ball to pocket that object ball.
I admit, this is a gift that I'm very thankful for. And I'm thankful for this because I realize that the majority of people don't have this ability. And it's become increasingly clear to me, when I read all these aiming threads on AZBilliards, that this lucid 3D spacial perception is not common at all.
So JB Cases, before you go asking questions like "How do you know where the ghost (imaginary ball) is?" in a challenging manner, please realize that different people have different skills, different levels of visual perception. And it's not a matter of eyesight strength, either. I've seen 80-year-olds that've demonstrated to me they "see" the ghostball very clearly, even with
Macular Degeneration. They've done the "put the cue tip upon the exact spot where the ghostball sits in-line with the shot" from over 6 feet away, which proves to me that they aren't hiding the ability to see the ghostball by using some other method. They may not be able to see the edges of the balls clearly due to Macular Degeneration, but they can certainly see the center of a fuzzy image, and can put their cue tip through the middle of it.
Just as is the case with folks doubting CTE, don't get caught in the same trap and doubt ghostball technique works, or that some folks do it better than others.
Just some food for thought,
-Sean