G. tries to answer the question as to which aspects of the meaning of natural language utterances can be described within a truth-conditional semantics and which aspects should be described within a formal pragmatic theory. It is argued that no truth-conditional account of illocutionary force, implicature or presupposition can be adequate. Most of the thesis is devoted to the construction of a formal pragmatic theory for those aspects of meaning. G. claims that such a theory can reduce the amount of syntactic and semantic apparatus needed to describe natural language. That claim is illustrated with reference to phenomena such as negation, conditionals and coordination.