substitutivity

The third mark of intentionality involves the failure of substitutivity for coextensive singular terms.

Roderick Chisholm Feldman, Richard 2008

Equality plays a fundamental role, and a central issue is the substitutivity of equals for equals.

Intensional Logic Fitting, Melvin 2007

At least on one account, an intensional context is a linguistic context in which the substitutivity of identity fails.

The Epistemology of Modality Vaidya, Anand 2007

We should not make use of equality of extensions in an intensional context, and an intensional context is one in which such substitutivity does not work.

Intensional Logic Fitting, Melvin 2007

The failure of substitutivity of co-referential expressions in ˜that p™ contexts created by psychological verbs can consequently be understood

Consciousness and Intentionality Siewert, Charles 2006

For present purposes the important point to recognise is that, however these counter-examples to the substitutivity principle are explained, they are not counter-examples to Leibniz's Law, which says nothing about substitutivity of codesignators in any language.

Identity Noonan, Harold 2006

Leibniz's Law must be clearly distinguished from the substitutivity principle, that if “a” and

Identity Noonan, Harold 2006

The explanation of the failure of the substitutivity principle can differ from case to case.

Identity Noonan, Harold 2006

(See Priest (1991) for yet another interesting form the paradox might take, a form which makes explicit the paradox's dependence on condition (iii) mentioned above and presents the argument as proceeding by substitutivity of identicals.)

Sorites Paradox Hyde, Dominic 2005

The problem with this strategy is that there are sentences that seem to describe intentional relations and that, unlike knowledge reports, are not intensional at all, for they pass the substitutivity test.

Intentionality Jacob, Pierre 2003