Combining Texts
Ideas for
'Writing the Book of the World', 'Consciousness Explained' and 'Philosophical Investigations'
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9 ideas
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
14980
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There is a real issue over what is the 'correct' logic [Sider]
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15000
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'It is raining' and 'it is not raining' can't be legislated, so we can't legislate 'p or ¬p' [Sider]
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5. Theory of Logic / A. Overview of Logic / 6. Classical Logic
15020
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Classical logic is good for mathematics and science, but less good for natural language [Sider]
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5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence
15029
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Modal accounts of logical consequence are simple necessity, or essential use of logical words [Sider]
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5. Theory of Logic / E. Structures of Logic / 1. Logical Form
18743
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Wittgenstein says we want the grammar of problems, not their first-order logical structure [Wittgenstein, by Horsten/Pettigrew]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives
15019
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Define logical constants by role in proofs, or as fixed in meaning, or as topic-neutral [Sider]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / a. Names
4139
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Naming is a preparation for description [Wittgenstein]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / b. Names as descriptive
4946
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A name is not determined by a description, but by a cluster or family [Wittgenstein, by Kripke]
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5. Theory of Logic / H. Proof Systems / 4. Natural Deduction
15001
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'Tonk' is supposed to follow the elimination and introduction rules, but it can't be so interpreted [Sider]
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