 To help us focus in on the topic at hand, contrast examples (1)–(4) above with familiar examples of causal explanation—for instance, the disappearance of a puddle through evaporation because of the warmth of the surrounding air. What makes this an instance of explanation is a matter for debate, although a good enough approximation for our purposes is that it turns on how (in this case causal) explanation works. As Lange puts it: a causal explanation