  The motivation for Adorno's negative dialectic is not simply conceptual, however, nor are its intellectual resources. His epistemology is “materialist” in both regards. It is motivated, he says, by undeniable human suffering—a fact of unreason, if you will, to counter Kant's “fact of reason.” Suffering is the corporeal imprint of society and the object upon human consciousness: “The need to let suffering speak is a condition of all truth. For suffering is objectivity that weighs upon the subject … ” (ND 17–18). The resources available to philosophy in this regard include the “expressive” or “mimetic” dimensions of language, which conflict with “ordinary” (i.e., societally sanctioned) syntax and semantics. In philosophy, this requires an emphasis on “presentation” (Darstellung) in which logical stringency and expressive flexibility interact (ND 18–19, 52–53). Another resource lies in unscripted relationships among established concepts. By taking such concepts out of their established patterns and rearranging them in “constellations” around a specific subject matter, philosophy can unlock some of the historical dynamic hidden within objects whose identity exceeds the classifications imposed upon them (ND 52–53, 162–66).