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'On the Question of Absolute Undecidability', 'Thought' and 'Mathematical Logic (revised)'
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9 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 / E. Structures of Logic / 1. Logical Form
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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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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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5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic
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12221
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'Corner quotes' (quasi-quotation) designate 'whatever these terms designate' [Quine]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / f. Names eliminated
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19321
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We might do without names, by converting them into predicates [Quine, by Kirkham]
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5. Theory of Logic / K. Features of Logics / 5. Incompleteness
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17894
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We have no argument to show a statement is absolutely undecidable [Koellner]
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