 Grimm claims that the distinctive nature of these abilities flows from the distinctive nature of the objects of understanding (Grimm 2017). Suppose that the connections or relations one grasps are complex enough to constitute what we might call “structures”—structures with parts that depend upon one another in various ways. Arguably, for the mind to take up these structures in the right way, it is not enough simply to assent to their existence. Rather, one needs to appreciate how the structure “works”, or how changes in its various parts will lead, or fail to lead, to changes in other parts.