Combining Texts

All the ideas for 'Locke on Essences and Kinds', 'New Foundations for Mathematical Logic' and 'The Logic of Decision'

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7 ideas

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets

9879	NF has no models, but just blocks the comprehension axiom, to avoid contradictions [Quine, by Dummett]

9. Objects / D. Essence of Objects / 13. Nominal Essence

15642

If kinds depend only on what can be observed, many underlying essences might produce the same kind [Eagle]

15645

Nominal essence are the observable properties of things [Eagle]

15643

Nominal essence mistakenly gives equal weight to all underlying properties that produce appearances [Eagle]

10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / b. Worlds as fictions

16285

A possible world can be seen as a complete and consistent novel [Jeffrey]

14. Science / C. Induction / 6. Bayes's Theorem

19155

Instead of gambling, Jeffrey made the objects of Bayesian preference to be propositions [Jeffrey, by Davidson]

26. Natural Theory / B. Natural Kinds / 4. Source of Kinds

15641

Kinds are fixed by the essential properties of things - the properties that make it that kind of thing [Eagle]