Combining Philosophers
Ideas for Roger Fry, Dale Jacquette and Jonathan Tallant
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10 ideas
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
9457

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

7681

Logic describes inferences between sentences expressing possible properties of objects [Jacquette]

5. Theory of Logic / A. Overview of Logic / 6. Classical Logic
9463

Classical logic is bivalent, has excluded middle, and only quantifies over existent objects [Jacquette]

5. Theory of Logic / C. Ontology of Logic / 2. Platonism in Logic
7682

Logic is not just about signs, because it relates to states of affairs, objects, properties and truthvalues [Jacquette]

5. Theory of Logic / F. Referring in Logic / 2. Descriptions / c. Theory of definite descriptions
7697

On Russell's analysis, the sentence "The winged horse has wings" comes out as false [Jacquette]

5. Theory of Logic / G. Quantification / 4. Substitutional Quantification
9466

Nominalists like substitutional quantification to avoid the metaphysics of objects [Jacquette]

9465

Substitutional universal quantification retains truth for substitution of terms of the same type [Jacquette]

5. Theory of Logic / I. Semantics of Logic / 5. Extensionalism
9458

Extensionalists say that quantifiers presuppose the existence of their objects [Jacquette]

5. Theory of Logic / I. Semantics of Logic / 6. Intensionalism
9461

Intensionalists say meaning is determined by the possession of properties [Jacquette]

5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / d. Russell's paradox
7701

Can a Barber shave all and only those persons who do not shave themselves? [Jacquette]
