Combining Texts

All the ideas for 'Extrinsic Properties', 'Investigations into Logical Deduction' and 'reports'

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5 ideas

5. Theory of Logic / H. Proof Systems / 4. Natural Deduction

13832

Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking]

8. Modes of Existence / B. Properties / 4. Intrinsic Properties

14979

Being alone doesn't guarantee intrinsic properties; 'being alone' is itself extrinsic [Lewis, by Sider]

15454

Extrinsic properties come in degrees, with 'brother' less extrinsic than 'sibling' [Lewis]

9. Objects / A. Existence of Objects / 5. Individuation / b. Individuation by properties

15455

Total intrinsic properties give us what a thing is [Lewis]

10. Modality / A. Necessity / 8. Transcendental Necessity

3016	Even the gods cannot strive against necessity [Pittacus, by Diog. Laertius]