I do think that's what the poster is referring to: > the motion of the head with eyes fixed looking around the border of an object in space approximates the mo

I do think that's what the poster is referring to: > the motion of the head with eyes fixed looking around the border of an object in space approximates the motion of the hand tracing the same object His argument is that this kind of abstract reasoning would be mostly developed by education, so people with very little education would not be able to associate the shapes they see with those they touched.