 You might think, however, that  (3)  is false—as Schaffer puts the idea, “The thing is more-or-less spherical despite the minor dent, not because of it” (2012: 127). Note that  (1)  concerns merely partial grounding, while  (2)  concerns full grounding. But, as any merely partial ground is a partial ground, and any full ground is a partial ground, we can read (1)–(3) as targeting partial grounding, so there is no equivocation here.