 One aspect of information that Shannon’s definition explicitly does not cover is the actual content of the messages interpreted as propositions. So the statement “Jesus was Caesar” and “The moon is made of green cheese” may carry the same amount of information while their meaning is totally different. A large part of the effort in philosophy of information has been directed to the formulation of more semantic theories of information (Bar-Hillel &amp; Carnap 1953; Floridi 2002, 2003, 2011). Although Shannon’s proposals at first were almost completely ignored by philosophers it has in the past decennia become apparent that their impact on philosophical issues is big. Dretske (1981) was one of the first to analyze the philosophical implications of Shannon’s theory, but the exact relation between various systems of logic and theory of information are still unclear (see 6.6 Logic and Semantic Information). 