 Grounding Completeness  Necessarily, every fact is either fully grounded by, or a member of, some collection of facts each of which is either (a) the fact that \(R(x_1,\ldots ,x_n)\) or \(\neg R(x_1,\ldots ,x_n)\), for some perfectly natural \(R\) and objects \(x_1,\ldots ,x_n\); (b) the fact that \(\exists y(y=x)\), for some object \(x\), or (c) the fact that every object is one of \(xx\), where \(xx\) are all the objects there are. 