Combining Texts

Ideas for 'W.V. Quine', 'An Introduction to Modal Logic' and 'Action, Intention and Reason'

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8 ideas

4. Formal Logic / B. Propositional Logic PL / 1. Propositional Logic

8472	Sentential logic is consistent (no contradictions) and complete (entirely provable) [Orenstein]

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 / 2. Tools of Propositional Logic / e. Axioms of PL

8476	Axiomatization simply picks from among the true sentences a few to play a special role [Orenstein]

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]

4. Formal Logic / D. Modal Logic ML / 4. Alethic Modal Logic

8480	S4: 'poss that poss that p' implies 'poss that p'; S5: 'poss that nec that p' implies 'nec that p' [Orenstein]

4. Formal Logic / F. Set Theory ST / 1. Set Theory

8474	Unlike elementary logic, set theory is not complete [Orenstein]

4. Formal Logic / G. Formal Mereology / 1. Mereology

8465	Mereology has been exploited by some nominalists to achieve the effects of set theory [Orenstein]