Herbert Marcuse on Dialectic

“This organization of functional discourse is of vital importance; it serves as a vehicle of coordination and subordination. The unified, functional language is an irreconcilably anti-critical and anti-dialectical language. In it, operational and behavioral rationality absorbs the transcendent, negative, oppositional elements of Reason.”

“Such dialectical relation of opposites in and by the proposition is rendered possible by the recognition of the subject as an historical agent whose identity constitutes itself in and against its historical practice, in and against its social reality. The discourse develops and states the conflict between the thing and its function, and this conflict finds linguistic expression in sentences which join contradictory predicates in a logical unit—conceptual counterpart of the objective reality. In contrast to all Orwellian language, the contradiction is demonstrated, made explicit, explained, and denounced.”

“In the Platonic dialectic, … the terms “Being” “Non-being” “Movement,” “the One and the Many” “Identity” and “Contradiction” are methodically kept open, ambiguous, not fully defined. They have an open horizon, an entire universe of meaning which is gradually structured in the process of communication itself, but which is never closed. The propositions are submitted, developed, and tested in a dialogue, in which the partner is led to question the normally unquestioned universe of experience and speech, and to enter a new dimension of discourse—otherwise he is free and the discourse is addressed to his freedom. He is supposed to go beyond that which is given to him—as the speaker, in his proposition, goes beyond the initial setting of the terms. These terms have many meanings because the conditions to which they refer have many sides, implications, and effects which cannot be insulated and stabilized.”

“The contemporary mathematical and symbolic logic is certainly very different from its classical predecessor, but they share the radical opposition to dialectical logic. In terms of this opposition, the old and the new formal logic express the same mode of thought. it is purged from that “negative” which loomed so large at the origins of logic and of philosophic thought—the experience of the denying, deceptive, falsifying power of the established reality. And with the elimination of this experience, the conceptual effort to sustain the tension between “is” and “ought”, and to subvert the established universe of discourse in the name of its own truth is likewise eliminated from all thought which is to be objective, exact, and scientific. For the scientific subversion of the immediate experience which establishes the truth of science as against that of immediate experience does not develop the concepts which carry in themselves the protest and the refusal. The new scientific truth which they oppose to the accepted one does not contain in itself the judgment that condemns the established reality. … In contrast, dialectical thought is and remains unscientific to the extent to which it is such judgment.”