Combining Texts

All the ideas for 'Letters to Wagner', 'Belief Truth and Knowledge' and 'The Laws of Thought'

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7 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]

12. Knowledge Sources / B. Perception / 7. Causal Perception

3900	Maybe experience is not essential to perception, but only to the causing of beliefs [Armstrong, by Scruton]

13. Knowledge Criteria / C. External Justification / 1. External Justification

4253	Externalism says knowledge involves a natural relation between the belief state and what makes it true [Armstrong]

26. Natural Theory / A. Speculations on Nature / 7. Later Matter Theories / a. Early Modern matter

19436

Bare or primary matter is passive; it is clothed or secondary matter which contains action [Leibniz]