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'Physiologia', 'works' and 'Thought'
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8 ideas
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
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3093
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Any two states are logically linked, by being entailed by their conjunction [Harman]
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5. Theory of Logic / A. Overview of Logic / 6. Classical Logic
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3098
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Deductive logic is the only logic there is [Harman]
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5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
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3094
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You don't have to accept the conclusion of a valid argument [Harman]
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5. Theory of Logic / C. Ontology of Logic / 3. If-Thenism
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21493
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Pure mathematics deals only with hypotheses, of which the reality does not matter [Peirce]
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5. Theory of Logic / D. Assumptions for Logic / 1. Bivalence
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19102
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Bivalence is a regulative assumption of enquiry - not a law of logic [Peirce, by Misak]
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5. Theory of Logic / E. Structures of Logic / 1. Logical Form
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3080
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Logical form is the part of a sentence structure which involves logical elements [Harman]
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3081
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A theory of truth in a language must involve a theory of logical form [Harman]
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3084
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Our underlying predicates represent words in the language, not universal concepts [Harman]
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