Combining Texts

All the ideas for 'History of Ancient Art', 'Lewis's Programme' and 'An Introduction to Modal Logic'

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7 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]

10. Modality / B. Possibility / 9. Counterfactuals

8431	Problems with Goodman's view of counterfactuals led to a radical approach from Stalnaker and Lewis [Horwich]

21. Aesthetics / B. Nature of Art / 4. Art as Expression

8119	Art aims only at beauty, of form, of idea, and (above all) of expression [Winckelmann, by Tolstoy]

26. Natural Theory / C. Causation / 9. General Causation / c. Counterfactual causation

8432	Analyse counterfactuals using causation, not the other way around [Horwich]