Intensional Logic and the Metaphysics of Intentionality

The MIT Press (1988)
This book tackles the issues that arise in connection with intensional logic -- a formal system for representing and explaining the apparent failures of certain important principles of inference such as the substitution of identicals and existential generalization-- and intentional states --mental states such as beliefs, hopes, and desires that are directed towards the world. The theory offers a unified explanation of the various kinds of inferential failures associated with intensional logic but also unifies the study of intensional contexts and intentional states by grounding the explanation of both phenomena in a single theory. When an axiomatized realm of abstract entities is added to the metaphysical structure of the world, we can use them to identify and individuate the contents of directed mental states. The special abstract entities can be viewed as the objectified contents of mental files, and they play a crucial role in the analysis of truth conditions of the sentences involved in inferential failures.
Keywords intentionality, intensionality
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ISBN(s) 0262240270  
DOI 10.2307/2185073
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Chad Carmichael (2015). Deep Platonism. Philosophy and Phenomenological Research 91 (1).
Stacie Friend (2007). Fictional Characters. Philosophy Compass 2 (2):141–156.

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