[1]
Actually, there are some questions here, for there seem to be obvious instances of R3 with which the mechanist is and should be entirely comfortable, e.g., the neuron and the mechanism of the action potential. So presumably this strategy would be employed only when the relationship appeared to violate the “lower-level entity” constraint. I’ve not the space to pursue this further here, so will note only that selectively pursuing the Kohler strategy would need separate justification.