Combining Texts
Ideas for
'Mind and Its Place in Nature', 'Empty Names' and 'Philosophical Logic: Intro to Advanced Topics'
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9 ideas
5. Theory of Logic / A. Overview of Logic / 4. Pure Logic
13850
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In modern logic all formal validity can be characterised syntactically [Engelbretsen/Sayward]
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5. Theory of Logic / A. Overview of Logic / 6. Classical Logic
13849
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Classical logic rests on truth and models, where constructivist logic rests on defence and refutation [Engelbretsen/Sayward]
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5. Theory of Logic / D. Assumptions for Logic / 4. Identity in Logic
13851
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Unlike most other signs, = cannot be eliminated [Engelbretsen/Sayward]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / a. Names
18935
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Semantic theory should specify when an act of naming is successful [Sawyer]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / c. Names as referential
18945
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Millians say a name just means its object [Sawyer]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / e. Empty names
18934
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Sentences with empty names can be understood, be co-referential, and even be true [Sawyer]
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18938
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Frege's compositional account of truth-vaues makes 'Pegasus doesn't exist' neither true nor false [Sawyer]
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5. Theory of Logic / F. Referring in Logic / 2. Descriptions / c. Theory of definite descriptions
18947
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Definites descriptions don't solve the empty names problem, because the properties may not exist [Sawyer]
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5. Theory of Logic / K. Features of Logics / 5. Incompleteness
13852
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Axioms are ω-incomplete if the instances are all derivable, but the universal quantification isn't [Engelbretsen/Sayward]
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