This paper reviews Deleuze’s theory of language in Logic of Sense, and Deleuze and Guattari’s theory of language in A Thousand Plateaus. In the ontology informed by the Stoics described in those books, human being and language do not exist separately but in a mixture of words and things. The author argues that this flattened ontology of surfaces is incommensurable with the ontology of depth used in conventional humanist qualitative methodology and recommends beginning new empirical inquiry with a concept instead (...) of with method and methodology. (shrink)