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The "idealist" and the "materialist" are both exclusive predications. There have been attempts to question this exclusivist opposition, generally by way of a critique of the "idealist" predication of the subject: Nietzsche and Freud are the most spectacular European examples. Sometimes consciousness is analogized with labor-power as in the debates over intellectual and manual labor. Althusser's notion of "theoretical production" is the most controversial instance For Marx 173-93. The anti-Oedipal argument in France seems to assume a certain body without predication or without predication-function. (The celebrated "body without organs" is one product of this assumption -see Gilles Deleuze and Felix Guattari, Anti-Oedipus: Capitalism and Schizophrenia.) I have not yet been able to read this as anything but a last-ditch metaphysical longing. Since I remain bound by the conviction that subject-predication is methodologically necessary, I will not comment upon this anti-Oedipal gesture. The better part of my essay will concern itself with what the question of value becomes when determined by a "materialist" subject-predication such as Marx's. This is a theoretical enterprise requiring a certain level of generality whose particular political implications I have tabulated in passing and in conclusion. Here it is in my interest to treat the theory-politics opposition as if intact.
Gayatri Chakravorty Spivak (Tue,) studied this question.