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'fragments/reports', 'What is Logic?' and 'Philosophy of Logic'
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8 ideas
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
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9020
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My logical grammar has sentences by predication, then negation, conjunction, and existential quantification [Quine]
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5. Theory of Logic / A. Overview of Logic / 3. Value of Logic
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9028
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Maybe logical truth reflects reality, but in different ways in different languages [Quine]
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5. Theory of Logic / A. Overview of Logic / 4. Pure Logic
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13845
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The various logics are abstractions made from terms like 'if...then' in English [Hacking]
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5. Theory of Logic / A. Overview of Logic / 5. First-Order Logic
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13840
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First-order logic is the strongest complete compact theory with Löwenheim-Skolem [Hacking]
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13844
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A limitation of first-order logic is that it cannot handle branching quantifiers [Hacking]
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5. Theory of Logic / A. Overview of Logic / 7. Second-Order Logic
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10014
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Quine rejects second-order logic, saying that predicates refer to multiple objects [Quine, by Hodes]
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10828
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Quantifying over predicates is treating them as names of entities [Quine]
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13842
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Second-order completeness seems to need intensional entities and possible worlds [Hacking]
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