In his 1989 "Contingency, Irony, and Solidarity", Richard Rorty argues that Derrida (especially in his book, "", one section of which is an experiment in fiction) purposefully uses words that cannot be defined (e.g., "différance"), and uses previously definable words in contexts diverse enough to make understanding impossible, so that the reader will never be able to contextualize Derrida's literary self. Rorty, however, argues that this intentional obfuscation is philosophically grounded. In garbling his message Derrida is attempting to escape the naïve, positive metaphysical projects of his predecessors.