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After the new forms are introduced into the language, it is possible to formulate with their help internal questions and possible answers to them. A question of this kind may be either empirical or logical; accordingly a true answer is either factually true or analytic.

— Rudolf Carnap Empiricism, Semantics, and Ontology (1950)

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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)

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.

The Unity of Science (1934)

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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.