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Single Idea 9457

[filed under theme 5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic ]

Full Idea

Philosophy of logic has (roughly) two camps: extensionalists and intensionalists, with the former view dominant. ...There is a close connection between this and eliminativist or reductivist versus folk psychological and intentionalist philosophy of mind.

Gist of Idea

The two main views in philosophy of logic are extensionalism and intensionalism

Source

Dale Jacquette (Intro to 'Philosophy of Logic' [2002], §4)

Book Ref

'Philosophy of Logic: an anthology', ed/tr. Jacquette,Dale [Blackwell 2002], p.5


A Reaction

Hm. I think I favour intensionalism in the logic, and reductivism about the mind, so I may have a bit of bother here. I'm convinced that this jigsaw can be completed, despite all appearances.

Related Idea

Idea 5637 Nowadays logic is seen as the science of extensions, not intensions [Scruton]


The 6 ideas from 'Intro to 'Philosophy of Logic''

Modal logic is multiple systems, shown in the variety of accessibility relations between worlds [Jacquette]
The two main views in philosophy of logic are extensionalism and intensionalism [Jacquette]
Intensionalists say meaning is determined by the possession of properties [Jacquette]
Extensionalists say that quantifiers presuppose the existence of their objects [Jacquette]
Extensionalist semantics forbids reference to nonexistent objects [Jacquette]
Extensionalist semantics is circular, as we must know the extension before assessing 'Fa' [Jacquette]