Combining Philosophers

All the ideas for Bonaventura, Antony Eagle and Hilbert,D/Ackermann,W

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7 ideas

4. Formal Logic / C. Predicate Calculus PC / 1. Predicate Calculus PC
17750 The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki]
8. Modes of Existence / B. Properties / 8. Properties as Modes
16643 Accidents always remain suited to a subject [Bonaventura]
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]
9. Objects / E. Objects over Time / 6. Successive Things
16696 Successive things reduce to permanent things [Bonaventura]
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]