Combining Philosophers

All the ideas for Anaxarchus, Prodicus and GE Hughes/M Cresswell

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9 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]

13. Knowledge Criteria / D. Scepticism / 1. Scepticism

3061	Anaxarchus said that he was not even sure that he knew nothing [Anaxarchus, by Diog. Laertius]

19. Language / F. Communication / 3. Denial

1554	Contradiction is impossible, since only one side of the argument refers to the true facts [Prodicus, by Didymus the Blind]

28. God / B. Proving God / 3. Proofs of Evidence / c. Teleological Proof critique

1555	People used to think anything helpful to life was a god, as the Egyptians think the Nile a god [Prodicus]

28. God / C. Attitudes to God / 5. Atheism

535	The gods are just personified human benefits [Prodicus]

1543	He denied the existence of the gods, saying they are just exaltations of things useful for life [Prodicus]