Philosophy Lexicon of Arguments

Extension, philosophy: an object, for example, the planet Venus as a material body, independent from the manner in which it is singled out. In contrast, intension is the way in which the object is given or is represented, e.g. Morning star or Evening star. See also intensions, identity, identity conditions, reference, meaning, assertibility conditions, propositional attitudes, opacity.
Author Item Excerpt Meta data

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VI 59
Extensional/Carnap: E.g. "The class of humans is contained in the class of mortals" - pseudo-intensional: "x is mortal".
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Newen/Schrenk I 28
Def Extension/Carnap: from singular terms: the object - extension of sentence/sentence extension: the truth value - extension of predicate: single-digit: set of objects with the corresponding property - two-digit: set of pairs, etc. - Def Intension/Carnap: information content of the sentence - set of possible worlds where the corresponding sentence is true - Individual Concept/Carnap: intension pf a description.
I 30
Hyper-Intensionality: Problem: necessarily true or false sentences are true or false in the same sets of possible worlds - hence indistinguishable by possible world semantics.

Ca I
R. Carnap
Die alte und die neue Logik
Wahrheitstheorien, G. Skirbekk (Hg), Frankfurt 1996

R. Carnap
Philosophie als logische Syntax
Philosophie im 20.Jahrhundert, Bd II, A. Hügli/P.Lübcke (Hg), Reinbek 1993

R. Carnap
Mein Weg in die Philosophie Stuttgart 1992

R. Carnap
Der Logische Aufbau der Welt Hamburg 1998

R. Carnap
Sinn und Synonymität in natürlichen Sprachen
Zur Philosophie der idealen Sprache, J. Sinnreich (Hg), München 1982

Ca VIII (= PiS)
R. Carnap
Über einige Begriffe der Pragmatik
Zur Philosophie der idealen Sprache, J. Sinnreich (Hg), München 1982

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Ed. Martin Schulz, access date 2017-05-27