Combining Texts

All the ideas for 'True Method in Philosophy and Theology', 'A Plea for Substitutional Quantification' and 'The Foundations of Mathematics'

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5 ideas

4. Formal Logic / D. Modal Logic ML / 4. Alethic Modal Logic
9470 Modal logic is not an extensional language [Parsons,C]
5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
18844 You would cripple mathematics if you denied Excluded Middle [Hilbert]
5. Theory of Logic / G. Quantification / 4. Substitutional Quantification
9469 Substitutional existential quantifier may explain the existence of linguistic entities [Parsons,C]
9468 On the substitutional interpretation, '(∃x) Fx' is true iff a closed term 't' makes Ft true [Parsons,C]
7. Existence / A. Nature of Existence / 6. Criterion for Existence
19393 What is not active is nothing [Leibniz]