“When a truth is better conceived through abstraction, use the abstraction; if not, don't.”

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Joseph Joubert253

French moralist and essayist 1754–1824

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“In addition, 'Elementarism' is real instead of abstract. The use of the term 'abstract' also caused much misunderstanding. This is easily explained... As used in connection with visual methods of expression, the term 'abstract' is extremely relative. 'To abstract' something implies one of those mental activities (in contrast to emotional spontaneity) through which certain [aesthetic] values are isolated from the world of reality. However, when such values were realized visually and applied as purely constructive means, they became real. Thus the abstract was transformed into the real, thereby illustrating the relativity of the former term. Hence, the term ‘abstract-real’ [proposed by his former artist-fellow Piet Mondrian, ] was a fortunate invention, although in reference to a new orientation [van Doesburg's new art orientation 'Elementarism'] the term 'real' is sufficient. The period of abstraction is at an end. Is not an elementary painting, which is to say a certain composition of plane-linear colours, organic in itself, more concrete…”

Theo van Doesburg (1883–1931) Dutch architect, painter, draughtsman and writer

Quote from Van Doesburg's article 'Elementarism as real art', in: 'Painting and plastic art' - Rome, July 1926, in De Stijl', series XIII, 1 75-6, 1926, pp. 35–43
1926 – 1931

“It is terrible to destroy a person's picture of himself in the interests of truth or some other abstraction.”

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“Relativity is inherently convergent, though convergent toward a plurality of centers of abstract truths.”

Buckminster Fuller (1895–1983) American architect, systems theorist, author, designer, inventor and futurist

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Context: Relativity is inherently convergent, though convergent toward a plurality of centers of abstract truths. Degrees of accuracy are only degrees of refinement and magnitude in no way affects the fundamental reliability, which refers, as directional or angular sense, toward centralized truths. Truth is a relationship.

“The representational nature of maps, however, is often ignored – what we see when looking at a map is not the word, but an abstract representation that we find convenient to use in place of the world. When we build these abstract representations we are not revealing knowledge as much as are creating it.”

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“When semiotics posits such concepts as 'sign', it does not act like a science; it acts like philosophy when it posits such abstractions as subject, good and evil, truth or revolution.”

Umberto Eco book Semiotics and the Philosophy of Language

[O] : Introduction, 0.6
Semiotics and the Philosophy of Language (1984)
Context: When semiotics posits such concepts as 'sign', it does not act like a science; it acts like philosophy when it posits such abstractions as subject, good and evil, truth or revolution. Now, a philosophy is not a science, because its assertions cannot be empirically tested … Philosophical entities exist only insofar as they have been philosophically posited. Outside their philosophical framework, the empirical data that a philosophy organizes lose every possible unity and cohesion.
To walk, to make love, to sleep, to refrain from doing something, to give food to someone else, to eat roast beef on Friday — each is either a physical event or the absence of a physical event, or a relation between two or more physical events. However, each becomes an instance of good, bad, or neutral behavior within a given philosophical framework. Outside such a framework, to eat roast beef is radically different from making love, and making love is always the same sort of activity independent of the legal status of the partners. From a given philosophical point of view, both to eat roast beef on Friday and to make love to x can become instances of 'sin', whereas both to give food to someone and to make love to у can become instances of virtuous action.
Good or bad are theoretical stipulations according to which, by a philosophical decision, many scattered instances of the most different facts or acts become the same thing. It is interesting to remark that also the notions of 'object', 'phenomenon', or 'natural kind', as used by the natural sciences, share the same philosophical nature. This is certainly not the case of specific semiotics or of a human science such as cultural anthropology.