Combining Philosophers

All the ideas for Zoroaster, Antiphon and GE Hughes/M Cresswell

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11 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]

22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / j. Ethics by convention

536	We should follow the law in public, and nature in private [Antiphon]

1557	To gain the greatest advantage only treat law as important when other people are present [Antiphon]

23. Ethics / C. Virtue Theory / 2. Elements of Virtue Theory / e. Character

540	The way you spend your time will form your character [Antiphon]

24. Political Theory / D. Ideologies / 2. Anarchism

539	Nothing is worse for mankind than anarchy [Antiphon]

29. Religion / B. Monotheistic Religion / 1. Monotheistic Religion

7598	Zoroaster and the Hebrew prophets evolved different versions of monotheism [Zoroaster, by Armstrong,K]

29. Religion / B. Monotheistic Religion / 3. Zoroastrianism

20672

Zoroastrianism saw the world as a battle between good evil gods [Zoroaster, by Harari]

7472	Zarathustra was the first to present a god who is an abstract concept [Zoroaster]