Combining Texts

Ideas for 'Metaphysics', 'Individuals:Essay in Descript Metaphysics' and 'Frege versus Cantor and Dedekind'

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4 ideas

4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / e. Axioms of PL

562	Axioms are the underlying principles of everything, and who but the philosopher can assess their truth? [Aristotle]

573	The axioms of mathematics are part of philosophy [Aristotle]

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

9986	The null set was doubted, because numbering seemed to require 'units' [Tait]

4. Formal Logic / F. Set Theory ST / 7. Natural Sets

9984	We can have a series with identical members [Tait]