Combining Philosophers
Ideas for Lynch,MP/Glasgow,JM, Roger Penrose and Charles Sanders Peirce
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7 ideas
5. Theory of Logic / A. Overview of Logic / 3. Value of Logic
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Only study logic if you think your own reasoning is deficient [Peirce]
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5. Theory of Logic / B. Logical Consequence / 4. Semantic Consequence |=
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Deduction is true when the premises facts necessarily make the conclusion fact true [Peirce]
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5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic
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Our research always hopes that reality embodies the logic we are employing [Peirce]
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5. Theory of Logic / C. Ontology of Logic / 3. If-Thenism
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Pure mathematics deals only with hypotheses, of which the reality does not matter [Peirce]
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Logic, unlike mathematics, is not hypothetical; it asserts categorical ends from hypothetical means [Peirce]
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5. Theory of Logic / D. Assumptions for Logic / 1. Bivalence
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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 / 6. Relations in Logic
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The logic of relatives relies on objects built of any relations (rather than on classes) [Peirce]
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