Combining Texts
Ideas for
'Metaphysics', 'The Barcan Formula and Metaphysics' and '23: Book of Isaiah'
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5 ideas
4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / e. Axioms of PL
562
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Axioms are the underlying principles of everything, and who but the philosopher can assess their truth? [Aristotle]
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573
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The axioms of mathematics are part of philosophy [Aristotle]
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4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula
16186
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The Barcan Formulas express how to combine modal operators with classical quantifiers [Simchen]
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16187
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The Barcan Formulas are orthodox, but clash with the attractive Actualist view [Simchen]
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16190
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BF implies that if W possibly had a child, then something is possibly W's child [Simchen]
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