Herbert Marcuse - Logic Quotes

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Thought is led, by the situation of its objects, to measure their truth in terms of another logic, another universe of discourse. And this logic projects another mode of existence: the realization of the truth in the words and deeds of man. And inasmuch as this project involves man as societal animal, the polis, the movement of thought has a political content. Thus, the Socratic discourse is political discourse inasmuch as it contradicts the established political institutions. The search for the correct definition, for the concept of virtue, justice, piety, and knowledge becomes a subversive undertaking, for the concept intends a new polis.

Herbert Marcuse
The ontological concept of truth is in the centre of a logic which may serve as a model of pre- technological rationality. It is the rationality of a two-dimensional universe of discourse which, contrasts with the of thought and behavior that develop in the execution of the technological project.

Herbert Marcuse
In [Aristotle's] formal logic, thought is organized in a manner very different from that of the Platonic dialogue. In this formal logic, thought is indifferent toward its objects. Whether they are mental or physical, whether they pertain to society or to nature, they become subject to the same general laws of organization, calculation, and conclusion — but they do so as fungible signs or symbols, in abstraction from their particular substance. This general quality (quantitative quality) is the precondition of law and order — in logic as well as in society — the price of universal control.

Herbert Marcuse
The methods of logical procedure are very different in ancient and modem logic, but behind all difference is the construction of a universally valid order of thought, neutral with respect to material content. Long before technological man and technological nature emerged as the objects of rational control and calculation, the mind was made susceptible to abstract generalization. Terms which could be organized into a coherent logical system, free from contradiction or with manageable contradiction, were separated from those which could not. Distinction was made between the universal, calculable, objective and the particular, incalculable, subjective dimension of thought.

Herbert Marcuse
Dialectical logic undoes the abstractions of formal logic and of transcendental philosophy, but it also denies the concreteness of immediate experience. To the extent to which this experience comes to rest with the things as they appear and happen to be, it is a limited and even false experience. It attains its truth if it has freed itself from the deceptive objectivity which conceals the factors behind the facts — that is, if it understands its world as a historical universe, in which the established facts are the work of the historical practice of man.

Herbert Marcuse
The subversive character of truth inflicts upon thought an imperative quality. Logic centers on judgments which are, as demonstrative propositions, imperatives, — the predicative is implies an ought. … Verification of the proposition involves a process in fact as well as in thought: (S) must become that which it is. The categorical statement thus turns into a categorical imperative; it does not state a fact but the necessity to bring about a fact. For example, it could be read as follows: man is not (in fact) free, endowed with inalienable rights, etc., but he ought to be.

Herbert Marcuse