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Single Idea 11970

[filed under theme 5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic ]

Full Idea

Logicians like their entities to exhibit a maximum degree of purity.

Gist of Idea

Logicians like their entities to exhibit a maximum degree of purity

Source

David Kaplan (Transworld Heir Lines [1967], p.97)

Book Ref

'The Possible and the Actual', ed/tr. Loux,Michael J. [Cornell 1979], 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.


The 13 ideas from David Kaplan

Indexicals have a 'character' (the standing meaning), and a 'content' (truth-conditions for one context) [Kaplan, by Macià/Garcia-Carpentiro]
'Content' gives the standard modal profile, and 'character' gives rules for a context [Kaplan, by Schroeter]
Are causal descriptions part of the causal theory of reference, or are they just metasemantic? [Kaplan, by Schaffer,J]
For Russell, expressions dependent on contingent circumstances must be eliminated [Kaplan]
'Haecceitism' says that sameness or difference of individuals is independent of appearances [Kaplan]
'Haecceitism' is common thisness under dissimilarity, or distinct thisnesses under resemblance [Kaplan]
If quantification into modal contexts is legitimate, that seems to imply some form of haecceitism [Kaplan]
Unusual people may have no counterparts, or several [Kaplan]
Essence is a transworld heir line, rather than a collection of properties [Kaplan]
Sentences might have the same sense when logically equivalent - or never have the same sense [Kaplan]
Models nicely separate particulars from their clothing, and logicians often accept that metaphysically [Kaplan]
Logicians like their entities to exhibit a maximum degree of purity [Kaplan]
The simplest solution to transworld identification is to adopt bare particulars [Kaplan]