Combining Texts

Ideas for 'Sweet Dreams', 'Transworld Heir Lines' and 'Three Grades of Modal Involvement'

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2 ideas

5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic
Whether a modal claim is true depends on how the object is described [Quine, by Fine,K]
     Full Idea: Quine says if ∃x□(x>7) makes sense, then for which object x is the condition rendered true? Specify it as '9' and it is apparently rendered true, specify it as 'the number of planets' and it is apparently rendered false.
     From: report of Willard Quine (Three Grades of Modal Involvement [1953]) by Kit Fine - Quine on Quantifying In p.105
     A reaction: This is normally characterised as Quine saying that only de dicto involvement is possible, and not de re involvement. Or that that all essences are nominal, and cannot be real.
Logicians like their entities to exhibit a maximum degree of purity [Kaplan]
     Full Idea: Logicians like their entities to exhibit a maximum degree of purity.
     From: David Kaplan (Transworld Heir Lines [1967], p.97)
     A reaction: An important observation, which explains why the modern obsession with logic has often led us down the metaphysical primrose path to ontological hell.