Combining Texts

All the ideas for 'works (all lost)', 'The Logical Basis of Metaphysics' and 'The Laws of Thought'

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11 ideas

1. Philosophy / D. Nature of Philosophy / 6. Hopes for Philosophy

1749	If all laws were abolished, philosophers would still live as they do now [Aristippus elder]

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

8083	Boole applied normal algebra to logic, aiming at an algebra of thought [Boole, by Devlin]

7727	Boole's notation can represent syllogisms and propositional arguments, but not both at once [Boole, by Weiner]

5. Theory of Logic / A. Overview of Logic / 2. History of Logic

8686	Boole made logic more mathematical, with algebra, quantifiers and probability [Boole, by Friend]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not

18801

Classical negation is circular, if it relies on knowing negation-conditions from truth-conditions [Dummett]

5. Theory of Logic / H. Proof Systems / 2. Axiomatic Proof

22277

Boole's method was axiomatic, achieving economy, plus multiple interpretations [Boole, by Potter]

22. Metaethics / A. Ethics Foundations / 1. Nature of Ethics / h. Against ethics

3558	Only the Cyrenaics reject the idea of a final moral end [Aristippus elder, by Annas]

22. Metaethics / C. The Good / 2. Happiness / d. Routes to happiness

5835	The road of freedom is the surest route to happiness [Aristippus elder, by Xenophon]

23. Ethics / A. Egoism / 3. Cyrenaic School

3018	People who object to extravagant pleasures just love money [Aristippus elder, by Diog. Laertius]

1751	Pleasure is the good, because we always seek it, it satisfies us, and its opposite is the most avoidable thing [Aristippus elder, by Diog. Laertius]

25. Social Practice / D. Justice / 3. Punishment / b. Retribution for crime

1755	Errors result from external influence, and should be corrected, not hated [Aristippus elder, by Diog. Laertius]