„A judgment, for me is not the mere grasping of a thought, but the admission of its truth.“

—  Gottlob Frege, Über Sinn und Bedeutung, Über Sinn und Bedeutung, 1892, Gottlob Frege (1892). On Sense and Reference, note 7.
Gottlob Frege Foto
Gottlob Frege5
deutscher Mathematiker, Logiker und Philosoph 1848 - 1925

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„So every virtue, so our grasp of truth“

—  Hermann Hesse, buch Das Glasperlenspiel
The Glass Bead Game (1943)

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„That language is an instrument of human reason, and not merely a medium for the expression of thought, is a truth generally admitted.“

—  George Boole English mathematician, philosopher and logician 1815 - 1864
Attributed from posthumous publications, George Boole, quoted in Kenneth E. Iverson's 1979 Turing Award Lecture

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„The supremacy of thought (consciousness) also pronounces the impotence of thought in an empirical world which philosophy transcends and corrects — in thought. The rationality in the name of which philosophy passed its judgments obtained that abstract and general purity” which made it immune against the world in which one had to live. With the exception of the materialistic “heretics,” philosophic thought was rarely afflicted by the afflictions of human existence. Paradoxically, it is precisely the critical intent in philosophic thought which leads to the idealistic purifications critical intent which aims at the empirical world as a whole, and not merely at certain modes of thinking or behaving within it. Defining its concepts in terms of potentialities which are of an essentially different order of thought and existence, the philosophic critique finds itself blocked by the reality from which it dissociates itself, and proceeds to construct a realm of Reason purged from empirical contingency. The two dimensions of thought — that of the essential and that of — the apparent truths — no longer interfere with each other, and their concrete dialectical relation becomes an abstract epistemological or ontological relation. The judgments passed on the given reality are replaced by propositions defining the general forms of thought, objects of thought, and relations between thought and its objects. The subject of thought becomes the pure and universal form of subjectivity, from which all particulars are removed.“

—  Herbert Marcuse, buch Der eindimensionale Mensch
One-Dimensional Man (1964), pp. 135-136

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