 In Difference and Repetition (1968, in English 1994), Deleuze develops his project in multiple directions. His work, he says, stems from the convergence of two lines of research: the concept of difference without negation, and the concept of repetition, in which physical and mechanical repetitions are masks for a hidden differential that is disguised and displaced. His major focus is a thoroughgoing critique of representational thinking, including identity, opposition, analogy, and resemblance (Deleuze 1994 [1968], 132). For Deleuze, “appearances of” are not representations, but sensory intensities free of subjective or objective identities (Deleuze 1994 [1968], 144). Without these identities, appearances are simulacra of an non-apparent differential he calls the “dark precursor” or “the in-itself of difference” (Deleuze 1994 [1968], 119). This differential is the non-sensible being of the sensible, a being not identical to the sensible, or to itself, but irreducibly problematic insofar as it forces us to encounter the sensible as “given.” 