  What are we to make of these differences between the two fields U and U′? Do they betoken any physical difference in gravitational realities? The template of the hole argument suggests that they do not. For the differences in U and U’ are not expressed in any differences in the observationally verifiable motions of bodies falling in the vicinity of the mass M; the forces in both fields are the same. Moreover the laws of Newtonian gravitation theory do not seem to be able to discern which of the two fields ought to be realized in space. We can fix the field at U=U′ for all space and all times t &lt; 0.5 and t &gt; 1.5. Nonetheless, Newtonian gravitation theory is unable to say which of U and U′ is the appropriate extension of the potential field into the times 0.5 &lt; t &lt; 1.5. Whatever dfferences there are between U and U′ in this region outstrip Newtonian gravitation theory.