 In this passage, Leibniz returns to the kind of criticism that he would present against the “superaddition” view that Locke presented to Stillingfleet, arguing that philosophers must reject the idea that gravity could simply be a feature of bodies that God adds to them, despite the fact that we cannot possibly understand gravitational interactions based on our idea of body (our idea of extended solid substances, or another similar idea). Indeed, Leibniz raises the stakes by contending that God himself could not explicate how such interactions are possible based on the idea of matter. Leibniz would argue, perhaps on metaphysical grounds, that any laws said to govern the interaction of bodies, and any qualities attributed to bodies, must be intelligible in the terms available to philosophers through the mechanist orientation. In particular, laws and qualities must be intelligible in terms of the shape, size, motion and impenetrability (or solidity) of bodies. In this way, one might conclude that Locke and Leibniz actually do not necessarily disagree on whether gravity can be made intelligible in mechanist terms; they simply disagree on the propriety of the contention that God could “superadd” a feature to bodies that cannot be made intelligible in that way.