As Dan pointed out here cousin_it’s definition of “fake number” has a very concrete meaning. The most your example shows is that the folk-physics notion “center of gravity” as opposed to the actual physics notion is a fake number.
While his definition of “true number” is fairly concrete, his definition of “fake number” is less so, and importantly is not disjoint with “true number”.
ETA: Having thought about it a bit and looked over it, I’m fairly sure we’re just talking past each other and there’s no coherent point of dispute in this discussion. I suggest we stop having it.
As Dan pointed out here cousin_it’s definition of “fake number” has a very concrete meaning. The most your example shows is that the folk-physics notion “center of gravity” as opposed to the actual physics notion is a fake number.
While his definition of “true number” is fairly concrete, his definition of “fake number” is less so, and importantly is not disjoint with “true number”.
ETA: Having thought about it a bit and looked over it, I’m fairly sure we’re just talking past each other and there’s no coherent point of dispute in this discussion. I suggest we stop having it.