Combining Philosophers

All the ideas for Bonaventura, Stephen Schiffer and GE Hughes/M Cresswell

expand these ideas     |    start again     |     specify just one area for these philosophers

---

8 ideas

4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / b. Terminology of PL

9540	A 'value-assignment' (V) is when to each variable in the set V assigns either the value 1 or the value 0 [Hughes/Cresswell]

4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / d. Basic theorems of PL

9541	The Law of Transposition says (P→Q) → (¬Q→¬P) [Hughes/Cresswell]

4. Formal Logic / B. Propositional Logic PL / 4. Soundness of PL

9543	The rules preserve validity from the axioms, so no thesis negates any other thesis [Hughes/Cresswell]

5. Theory of Logic / K. Features of Logics / 4. Completeness

9544	A system is 'weakly' complete if all wffs are derivable, and 'strongly' if theses are maximised [Hughes/Cresswell]

8. Modes of Existence / B. Properties / 8. Properties as Modes

16643

Accidents always remain suited to a subject [Bonaventura]

9. Objects / E. Objects over Time / 6. Successive Things

16696

Successive things reduce to permanent things [Bonaventura]

13. Knowledge Criteria / C. External Justification / 6. Contextual Justification / a. Contextualism

19508

Contextualism needs a semantics for knowledge sentences that are partly indexical [Schiffer,S]

19509

The indexical aspect of contextual knowledge might be hidden, or it might be in what 'know' means [Schiffer,S]