 Similarly, Mares (1997) uses a theory of information due to David Israel and John Perry (1990). In addition to other information a world contains informational links, such as laws of nature, conventions, and so on. For example, a Newtonian world will contain the information that all matter attracts all other matter. In information-theoretic terms, this world contains the information that two things’ being material carries the information that they attract each other. On this view, \(Rabc\) if and only if, according to the links in \(a\), all the information carried by what obtains in \(b\) is contained in \(c\). Thus, for example, if \(a\) is a Newtonian world and the information that \(x\) and \(y\) are material is contained in \(b\), then the information that \(x\) and \(y\) attract each other is contained in \(c\).