Consequently, philosophers have sometimes set the discussion up by saying that there is one kind of “information” appealed to in biology, the kind originally described by Shannon, that is unproblematic and does not require much philosophical attention. The term “causal” information is also sometimes used to refer to this concept, and this is essentially Grice’s “natural meaning”, (see entry on Grice) from his work in the philosophy of language (Grice 1957). Information in this sense exists whenever there is contingency and correlation. So we can say that genes contain information about the proteins they make, and also that genes contain information about the whole-organism phenotype. But when we say that, we are saying no more than what we are saying when we say that there is an informational connection between smoke and fire, or between tree rings and a tree’s age. The more contentious question becomes whether or not biology needs another, richer concept of information as well. Information in this richer sense is sometimes called “semantic” or “intentional” information.