 Although the argument is then not Newton’s, it is still an important response to the kind of relationism proposed by the folk-Leibniz, especially when it is extended by bringing in a further example from Newton’s Scholium. Newton considered a pair of identical spheres, connected by a cord, too far from any bodies to observe any relative motions; he pointed out that their rate and direction of rotation could still be experimentally determined by measuring the tension in the cord, and by pushing on opposite faces of the two globes to see whether the tension increased or decreased. He intended this simple example to demonstrate that the project he intended in the Principia, of determining the absolute accelerations and hence gravitational forces on the planets from their relative motions, was possible. However, if we further specify that the spheres and cord are rigid and that they are the only things in their universe, then the example can be used to point out that there are infinitely many different rates of rotation all of which agree on the relations between bodies. Since there are no differences in the relations between bodies in the different situations, it follows that the observable differences between the states of rotation cannot be explained in terms of the relations between bodies. Therefore, a theory of the kind attributed to the folk’s Leibniz cannot explain all the phenomena of Newtonian mechanics, and again we can argue abductively for absolute  space.[13]