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
Putnam, Hilary
Books on Amazon
Extensions V 45f
Extension/Putnam: "I" has no extension but extension function - intension/new: (Montague/Carnap): we associate with the term "cat" a function f (M), whose value at every possible world M is the number of possible objects that are cats in the world M - intension (new): indicates how the extension depends on worlds.
V 47
Extension unequal meaning/new: since logically equivalent terms in each world have the same intension and therefore also the same extension - meaning (old intension) does not remain with equivalence: E.g. cube, 6 polyhedra - in each possible world the same object - difference in meaning would be lost.

Pu I
H. Putnam
Von einem Realistischen Standpunkt Frankfurt 1993

H. Putnam
Repräsentation und Realität Frankfurt 1999

H. Putnam
Für eine Erneuerung der Philosophie Stuttgart 1997

H. Putnam
Pragmatismus Eine offene Frage Frankfurt 1995

Pu V
H. Putnam
Vernunft, Wahrheit und Geschichte Frankfurt 1990

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Ed. Martin Schulz, access date 2017-03-28