 To take another example, Sider (2011: Ch. 8; 2020) questions whether grounding is apt to play the role of a level connector. Intuitively, the world has an overarching structure where entities occupy different levels of reality. One way to formulate the view that grounding is a level connector is this: different levels of reality are connected to one another by virtue of grounding relations between facts characterizing occupants of these levels. With this in mind, consider the fundamental physical level and a higher level, one occupied by cities. The grounding theorist might claim that these levels are connected partly in virtue of the fact that some quantum-mechanical fact, Q, grounds the fact, N, that New York is a city. But Sider asks: what is the grounding profile of this grounding fact? On the face of it, [Q grounds N] itself is ungrounded. Roughly speaking, the worry is this: provided that any entity that an ungrounded fact concerns is fundamental in nature, it follows that New York is a fundamental entity. Hence, it may be that in using grounding to explain how different levels of reality are connected, we get unacceptable results about which entities are fundamental. (See  §4.3  for more on fundamentality; for an overview of views according to which facts like [Q grounds N] are grounded, see Litland 2020.)