Describes the structure of how sense gets produced as well as providing a clue to the structure of the book. Defines structuralism according to Claude Levi-Strauss: the dual series of signifier and signified and the paradoxical element - the empty place - that circulates between the two series allowing them to communicate. Looks at the dual series of language/knowledge, society/primitivism, political & economic totalities/technical progress, totalitarianism/reformism. Defines the terms of a series as singularities. Defines experiential structure as that which enables you to get from where you are to where you want to be.The wikipedia article on Claude Levi-Strauss gives some background and context to Deleuze's remarks and quotes from him.