Philosophy Lexicon of Arguments

Search  
 
Extensionality, philosophy: (also extensionality principle, extensionality thesis) an attempt to make the language distinct by taking complete sets of denoted objects as the meaning of the referring words. See also extensions, intensions, extensional language, ambiguity, propositional attitudes.
 
Author Item Excerpt Meta data
Quine, Willard Van Orman
 
Books on Amazon
Extensionality VII 89
Extensionality/Quine: ((x < y ) > ((y < x) > (x = y)) - i.e. a class is determined by its elements - (s) If x and y are subsets of each other, then they are the identical).
---
IX 22
Extensionality axiom/EA (= E law)/Quine: classes that are consistent in their elements are equal - "x(x e y u x e z) > y = z - Abbreviation for "x(x e y u x e z) u (y e x z e x)] - Problem:> Individuals.
---
IX 25
Extensionality axiom/Quine: (according to new identity definition: (y = z u y e w) > z e w.
---
IX 178
Extensionality/Quine: is that what distinguishes attributes from classes - two attributes can be of different order and, therefore, certainly different, and yet be applied to the things, e.g. the attribute "j(j^x jy) where "j" has the order 1, an attribute solely of y - E.g. attribute "c(c^x cy), where "c" has the order 2, again an attribute solely of y, but one of the attributes has the order 2, the other has the order 3.

Q I
W.V.O. Quine
Wort und Gegenstand Stuttgart 1980

Q II
W.V.O. Quine
Theorien und Dinge Frankfurt 1985

Q III
W.V.O. Quine
Grundzüge der Logik Frankfurt 1978

Q IX
W.V.O. Quine
Mengenlehre und ihre Logik Wiesbaden 1967

Q V
W.V.O. Quine
Die Wurzeln der Referenz Frankfurt 1989

Q VI
W.V.O. Quine
Unterwegs zur Wahrheit Paderborn 1995

Q VII
W.V.O. Quine
From a logical point of view Cambridge, Mass. 1953

Q VIII
W.V.O. Quine
Bezeichnung und Referenz
In
Zur Philosophie der idealen Sprache, J. Sinnreich (Hg), München 1982

Q X
W.V.O. Quine
Philosophie der Logik Bamberg 2005

Q XII
W.V.O. Quine
Ontologische Relativität Frankfurt 2003


> Counter arguments against Quine
> Counter arguments in relation to Extensionality



back to list view | > Suggest your own contribution | > Suggest a correction
 
Ed. Martin Schulz, access date 2017-03-30