  The view, that matter uniquely determines the field,  was a necessary postulate of an opposing  ontological standpoint, according to Weyl. The postulate essentially says that Matter is the only thing which is  genuinely real. According to this ontological view, held to a certain degree by the younger Einstein and others who advocated a form of Machian  empiricism, the field is relegated to play the role of a feeble  extensive medium which transmits effects from body to   body.[76] According to this opposing ontological view, the field laws, that is, certain implicit differential  connections between the various possible states of the field, on the  basis of which the field alone is capable of transmitting effects  caused by matter, can essentially have no more significance for  reality than the laws of geometry could, according to earlier views.  But as we saw earlier, Weyl held that no satisfactory solution can be given to  the problem of motion as long as we adhere to the Einstein-Machian  empiricist position that relegates the field to the role of a feeble extensive medium, and which does not acknowledge that the guiding  field is physically real. However, from the standpoint of Weyl’s agens theory of  matter, a satisfactory answer to Mach’s paradox can be given:  the reason why a stationary, homogeneous elastic sphere will bulge at the equator and flatten at the poles, when  set in rotation, is  due to the fact that the complete physical system consisting of both  the body and the guiding field, differs in the rotating case from the stationary one. The local guiding field is the real cause of the inertial forces. 