All the ideas for Peter B. Lewis, Charles Parsons and Crawford L. Elder

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15 ideas

4. Formal Logic / D. Modal Logic ML / 4. Alethic Modal Logic
 9470 Modal logic is not an extensional language [Parsons,C]
4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / j. Axiom of Choice IX
 13418 The old problems with the axiom of choice are probably better ascribed to the law of excluded middle [Parsons,C]
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]
6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / c. Counting procedure
 17447 Parsons says counting is tagging as first, second, third..., and converting the last to a cardinal [Parsons,C, by Heck]
6. Mathematics / C. Sources of Mathematics / 4. Mathematical Empiricism / c. Against mathematical empiricism
 18201 General principles can be obvious in mathematics, but bold speculations in empirical science [Parsons,C]
6. Mathematics / C. Sources of Mathematics / 8. Finitism
 13419 If functions are transfinite objects, finitists can have no conception of them [Parsons,C]
7. Existence / D. Theories of Reality / 10. Ontological Commitment / e. Ontological commitment problems
 13417 If a mathematical structure is rejected from a physical theory, it retains its mathematical status [Parsons,C]
8. Modes of Existence / B. Properties / 1. Nature of Properties
 13795 Properties only have identity in the context of their contraries [Elder]
9. Objects / B. Unity of Objects / 3. Unity Problems / c. Statue and clay
 13798 Maybe we should give up the statue [Elder]
9. Objects / D. Essence of Objects / 6. Essence as Unifier
 13797 The loss of an essential property means the end of an existence [Elder]
9. Objects / D. Essence of Objects / 9. Essence and Properties
 13794 Essential properties by nature occur in clusters or packages [Elder]
 13796 Essential properties are bound together, and would be lost together [Elder]
11. Knowledge Aims / C. Knowing Reality / 3. Idealism / d. Absolute idealism
 21912 Fichte, Schelling and Hegel rejected transcendental idealism [Lewis,PB]
 21911 Fichte, Hegel and Schelling developed versions of Absolute Idealism [Lewis,PB]