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Single Idea 13081

[filed under theme 10. Modality / E. Possible worlds / 3. Transworld Objects / a. Transworld identity ]

Full Idea

It might be suggested that even the extreme modal realist can countenance transworld identity for abstract objects.

Gist of Idea

Even extreme modal realists might allow transworld identity for abstract objects

Source

Cover,J/O'Leary-Hawthorne,J (Substance and Individuation in Leibniz [1999], 3.2.2 n46)

Book Ref

Cover,J/O'Leary-Hawthorne,J: 'Substance and Individuation in Leibniz' [CUP 1999], p.122


A Reaction

This may sound right for uncontroversial or well-defined abstracta such as numbers and circles, but even 'or' is ambiguous, and heaven knows what the transworld identity of 'democracy' is!


The 31 ideas with the same theme [can possible things be the same as actual things?]:

A horse would be destroyed if it were changed into a man or an insect [Spinoza]
If varieties of myself can be conceived of as distinct from me, then they are not me [Leibniz]
If someone's life went differently, then that would be another individual [Leibniz]
To know an object you must know all its possible occurrences [Wittgenstein]
The 'form' of an object is its possible roles in facts [Wittgenstein]
Can an unactualized possible have self-identity, and be distinct from other possibles? [Quine]
We can't quantify in modal contexts, because the modality depends on descriptions, not objects [Quine, by Fine,K]
Could possible Adam gradually transform into Noah, and vice versa? [Chisholm]
What Socrates could have been, and could have become, are different? [Plantinga]
If we discuss what might have happened to Nixon, we stipulate that it is about Nixon [Kripke]
Transworld identification is unproblematic, because we stipulate that we rigidly refer to something [Kripke]
A table in some possible world should not even be identified by its essential properties [Kripke]
Identification across possible worlds does not need properties, even essential ones [Kripke]
If possible Socrates differs from actual Socrates, the Indiscernibility of Identicals says they are different [Plantinga]
It doesn't matter that we can't identify the possible Socrates; we can't identify adults from baby photos [Plantinga]
If individuals can only exist in one world, then they can never lack any of their properties [Plantinga]
The simplest solution to transworld identification is to adopt bare particulars [Kaplan]
Why imagine that Babe Ruth might be a billiard ball; nothing useful could be said about the ball [Stalnaker]
Possible worlds identity needs a sortal [Gibbard]
Only concepts, not individuals, can be the same across possible worlds [Gibbard]
Transworld identity concerns the limits of possibility for ordinary things [Forbes,G]
The problem of transworld identity can be solved by individual essences [Forbes,G]
□ must be sensitive as to whether it picks out an object by essential or by contingent properties [Fitting/Mendelsohn]
Objects retain their possible properties across worlds, so a bundle theory of them seems best [Fitting/Mendelsohn]
Definite descriptions pick out different objects in different possible worlds [Fitting]
Even extreme modal realists might allow transworld identity for abstract objects [Cover/O'Leary-Hawthorne]
Necessity of identity seems trivial, because it leaves out the real essence [Oderberg]
Transworld identity is not a problem in de dicto sentences, which needn't identify an individual [Sider]
The individuals and kinds involved in modality are also a matter of convention [Sidelle]
The limits of change for an individual depend on the kind of individual [Simons]
Transworld identity without individual essences leads to 'bare identities' [Mackie,P]