Combining Texts

Ideas for 'Parmenides', 'Metaphysics' and 'Axiomatic Theories of Truth'

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5 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 / E. Nonclassical Logics / 3. Many-Valued Logic

16335

In Strong Kleene logic a disjunction just needs one disjunct to be true [Halbach]

16334

In Weak Kleene logic there are 'gaps', neither true nor false if one component lacks a truth value [Halbach]

4. Formal Logic / F. Set Theory ST / 1. Set Theory

16309

Every attempt at formal rigour uses some set theory [Halbach]