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Science is a system of statements based on direct experience, and controlled by experimental verification. Verification in science is not, however, of single statements but of the entire system or a sub-system of such statements.

— Rudolf Carnap The Unity of Science (1934)

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More quotes by Rudolf Carnap

Logic is the last scientific ingredient of Philosophy; its extraction leaves behind only a confusion of non-scientific, pseudo problems.

The Unity of Science (1934)

In science there are no 'depths'; there is surface everywhere.

Rudolf Carnap (1929)

A decisive difference between our method and Frege's consists in the fact that our concepts, in distinction to Frege's, are independent of the context.

Meaning and Necessity (1947)

Frege's pair of concepts (nominatum and sense) is compared with our pair (extension and intension). The two pairs coincide in ordinary (extensional) contexts, but not in oblique (nonextensional) contexts.

Meaning and Necessity (1947)

If someone wishes to speak in his language about a new kind of entities, he has to introduce a system of new ways of speaking, subject to new rules; we shall call this procedure the construction of a linguistic framework for the new entities in question.

Empiricism, Semantics, and Ontology (1950)

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The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents.

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All religions, arts and sciences are branches of the same tree. All these aspirations are directed toward ennobling man's life, lifting it from the sphere of mere physical existence and leading the individual towards freedom.

Albert Einstein Moral Decay (1937)

Science and religion are two human enterprises sharing many features.

Freeman Dyson Infinite in All Directions (1988)

To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.

Henri Poincaré Science and Hypothesis (1901)

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Quote text and notes from Wikiquote: Rudolf Carnap (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.