 Another informational interpretation is in Dunn (2015). This interpretation neatly connects the concept of relevance in relevance logic with the pragmatic notion of relevance in Grice’s conversational maxims and in Sperber and Wilson’s pragmatic theory. The idea is that the relation \(R\) holds between three “states”, \(a,b\), and \(c\) if in the context \(a, b\) is relevant to \(c\). This means that using the information both in \(a\) and \(b\) allows one to derive the information in \(c\). The notion of derivation here is one that Sperber and Wilson call “contextual implication”. The result is derivable from the information in \(a\) and \(b\), but not from the information in either alone (Sperber and Wilson, 2002, p. 251). There are various ways to think of the combination of information in \(a\) and \(b\). One that Dunn discusses is to think of \(a\) and \(b\) as being similar to computer programs and the combination of the two is their composition -- the result of running \(b\) and taking the result of that as input for \(a\), and then running \(a\). This combination is relevant to \(c\) if the information produced by it is all contained in \(c\).