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Rudolf Carnap    
Carnap (1947) proposed a new formulation of the sense/reference dichotomy, which was translated into the distinction between intension and extension. The notion of intension was intended to be an explicatum of Frege’s “obscure” notion of sense: two expressions have the same intension if and only if they have the same extension in every possible world or, in Carnap’s terminology, in every state description (i.e., in every maximal consistent set of atomic sentences and negations of atomic sentences). Thus, ‘round’ and ‘spherical’ have the same intension (i.e., they express the same function from possible worlds to extensions) because they apply to the same objects in every possible world. Carnap later suggested that intensions could be regarded as the content of lexical semantic competence: to know the meaning of a word is to know its intension, the general conditions which an object must fulfill in order to be denoted by [that] word

Zdroj: prednasky Andreanskeho, Carnap : O povahe filozofickych problemov
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