Combining Texts

All the ideas for 'Moral Thinking: Its Levels,Method and Point', 'Critical Common-Sensism' and 'The Laws of Thought'

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11 ideas

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 / H. Proof Systems / 2. Axiomatic Proof

22277

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

9. Objects / B. Unity of Objects / 3. Unity Problems / e. Vague objects

14797

Vagueness is a neglected but important part of mathematical thought [Peirce]

14798

All communication is vague, and is outside the principle of non-contradiction [Peirce]

22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / i. Prescriptivism

4125	Hare says I acquire an agglomeration of preferences by role-reversal, leading to utilitarianism [Hare, by Williams,B]

4126	If we have to want the preferences of the many, we have to abandon our own deeply-held views [Williams,B on Hare]

4127	If morality is to be built on identification with the preferences of others, I must agree with their errors [Williams,B on Hare]

22483

A judgement is presciptive if we expect it to be acted on [Hare]

23. Ethics / B. Contract Ethics / 8. Contract Strategies

4360	By far the easiest way of seeming upright is to be upright [Hare]