 It is unclear, however, whether examples such as this do indeed show that Newtonian mechanics is indeterministic. The force acting on the mass, which is given by \(F=r^{1/2},\) does not satisfy a continuity condition for \(r=0\)—the so-called Lipschitz condition. According to the Cauchy-Lipschitz theorem, the Lipschitz continuity condition (which, intuitively, restricts how fast a function can change) is a sufficient condition for the initial value problem to have a unique solution—that is, for the system at issue to behave deterministically (“Cauchy-Lipschitz theorem” in  Other Internet References).  And one can argue that conditions constraining the allowable force functions in Newton’s law, such as the Lipschitz condition, are an integral part of the content of Newtonian physics. Thus, whether we take Newtonian physics to be deterministic depends on what we take the content of the theory to be. If what counts as a Newtonian system is not given by Newton’s laws alone but depends on additional conditions, including the Lipschitz condition, then the theory is deterministic after all (Fletcher 2012). If the content of the theory is given merely by the conjunction of Newton’s laws without additional constraints on allowable force functions, then Norton’s example shows that the theory is not deterministic.