 Later developments in situation semantics emphasized its role as a general theory of information content. The key concept is the notion of a state-of-affair or “infon” (see the entry  states of affairs).  State-of-affairs are non-linguistic formal objects that come in various stages of complexity (see Gawron &amp; Peters 1990 for a brief overview, Devlin 1991, 2006 for a more detailed exposition, and Ginzburg &amp; Sag 2000 for a system based on a richer ontology). The simplest kinds of state-of-affairs consist of a relation, individuals related by the relation, and a polarity, and might be represented as in (8):