Fig. 7.
Degrees of abstraction. Because function can be described at varying degrees of abstraction, a phenomenon that describes a relatively narrower, less abstract category (such as theory of mind) will always be contained within a broader, more abstract category (such as strategic reasoning or social reasoning). Here, each squiggly line represents narrower, more specific subfunctions, and the drawn borders demarcate all of the subfunctions responsible for producing the phenomenon.
