Ideas from 'A Plea for Substitutional Quantification' by Charles Parsons [1971], by Theme Structure
[found in 'Philosophy of Logic: an anthology' (ed/tr Jacquette,Dale) [Blackwell 2002,0-631-21868-8]].
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expand these ideas
4. Formal Logic / D. Modal Logic ML / 4. Alethic Modal Logic
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9470
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Modal logic is not an extensional language
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5. Theory of Logic / G. Quantification / 4. Substitutional Quantification
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9469
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Substitutional existential quantifier may explain the existence of linguistic entities
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9468
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On the substitutional interpretation, '(∃x) Fx' is true iff a closed term 't' makes Ft true
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