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Ideas for 'fragments/reports', 'Philosophy of Mathematics' and 'Russell's Metaphysical Logic'

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5 ideas

5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

9605	If a proposition is false, then its negation is true [Brown,JR]

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

21727

Definite descriptions theory eliminates the King of France, but not the Queen of England [Linsky,B]

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

21719

Extensionalism means what is true of a function is true of coextensive functions [Linsky,B]

5. Theory of Logic / K. Features of Logics / 1. Axiomatisation

9649	Axioms are either self-evident, or stipulations, or fallible attempts [Brown,JR]

5. Theory of Logic / L. Paradox / 4. Paradoxes in Logic / c. Berry's paradox

9638	Berry's Paradox finds a contradiction in the naming of huge numbers [Brown,JR]