Talk:Salva veritate

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Proposed Addition

Quine

W.v.O. Quine takes substitutivity Salva veritate to be the same as the indiscernibility of identicals. Given a true statement, one of it's two terms may be substituted for the other in any true statement and the result will be true^[1]. He continues to show that depending on context, the statement may change in value, In fact, the whole quantified modal logic of necessity is dependent on context and empty otherwise; for it collapses if essence is withdrawn^[2].

For example, the statements:

(1)	Giorgione = Barbarelli,
(2)	Giorgione was so-called because of his size

are true; however, replacement of the name 'Giorgione' by the name 'Barbarelli' turns (2) into the falsehood:

Barbarelli was so-called because of his size^[3].

Quine's example here refers to Giorgio Barbarelli's sobriquet "Giorgione", an Italian name roughly glossed as "Big George."

Ok, since no one has seen fit to leave any comments at all, I will edit the article now.

--Fan Singh Long (talk) 06:42, 13 February 2012 (UTC)[reply]

References

^ W.v.O. Quine, Quintessence, extensions, Reference and Modality, P378
^ Quine,W.V.O., Quintessence, Reference and Modality, P356-P357
^ W.v.O. Quine, Quintessence, extensions, Reference and Modality, P361

General description

I would also like to add to the general description some more of the Latin meaning and make it into:

The literal translation of the Latin "salva veritate" is "with unharmed truth", using ablative of manner. Salva meaning rescue, salvation, welfare and veritate meaning (with or by, since it is the ablative) reality, truth. Salva veritate is the logical condition in virtue of which interchanging two expressions may be done without changing the truth-value of statements in which the expressions occur. Substitution salva veritate is not possible in opaque contexts^[1].

Ok, since no one has seen fit to leave any comments at all, I will edit the article now.

--Fan Singh Long (talk) 06:42, 13 February 2012 (UTC)[reply]

References

^ L.T.F. Gamut, Logic, Language and Meaning, printed in 1991

[1] W.v.O. Quine, Quintessence, extensions, Reference and Modality, P378

[2] Quine,W.V.O., Quintessence, Reference and Modality, P356-P357

[3] W.v.O. Quine, Quintessence, extensions, Reference and Modality, P361

[4] L.T.F. Gamut, Logic, Language and Meaning, printed in 1991

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