Combining Texts

Ideas for 'Reference and Modality', 'Constructibility and Mathematical Existence' and 'The Concept of Logical Consequence'

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4 ideas

5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence

14181

Validity is where either the situation or the interpretation blocks true premises and false conclusion [Etchemendy, by Read]

14180

Etchemendy says fix the situation and vary the interpretation, or fix interpretations with varying situations [Etchemendy, by Read]

5. Theory of Logic / F. Referring in Logic / 1. Naming / b. Names as descriptive

10925

Failure of substitutivity shows that a personal name is not purely referential [Quine]

5. Theory of Logic / G. Quantification / 1. Quantification

10926

Quantifying into referentially opaque contexts often produces nonsense [Quine]