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9. Objects / F. Identity among Objects / 7. Indiscernible Objects

[objects between which no differences are detectable]

39 ideas
Each thing must be in some way unique [Diogenes of Apollonia]
If we made a perfect duplicate of Cratylus, there would be two Cratyluses [Plato]
There cannot be two substances with the same attributes [Spinoza]
There must be some internal difference between any two beings in nature [Leibniz]
No two things are totally identical [Leibniz]
Things in different locations are different because they 'express' those locations [Leibniz]
If two bodies only seem to differ in their position, those different environments will matter [Leibniz]
In nature there aren't even two identical straight lines, so no two bodies are alike [Leibniz]
Two eggs can't be identical, because the same truths can't apply to both of them [Leibniz]
We identify a stolen horse by its similarity to the original, but that doesn't mean that identity IS similarity [PG on Reid]
The Identity of Indiscernibles is true of concepts with identical properties, but not of particulars [Jolley on Kant]
If we ignore differences between water drops, we still distinguish them by their location [Kant]
An object is identical with itself, and no different indiscernible object can share that [Adams,RM on Russell/Whitehead]
Terms are identical if they belong to all the same classes [Russell]
It at least makes sense to say two objects have all their properties in common [Wittgenstein]
We should just identify any items which are indiscernible within a given discourse [Quine]
If the universe just held two indiscernibles spheres, that refutes the Identity of Indiscernibles [Black]
One thing can look like something else, without being the something else [Ellis]
If the universe was cyclical, totally indiscernible events might occur from time to time [Adams,RM]
Two events might be indiscernible yet distinct, if there was a universe cyclical in time [Adams,RM]
Black's two globes might be one globe in highly curved space [Adams,RM]
a and b share all properties; so they share being-identical-with-a; so a = b [Brody]
The bundle theory makes the identity of indiscernibles a necessity, since the thing is the properties [Stalnaker]
By the principle of Indiscernibility, a symmetrical object could only be half of itself! [Wiggins]
The Identity of Indiscernibles is really the same as the verification principle [Jolley]
Two pure spheres in non-absolute space are identical but indiscernible [Campbell,K]
The Indiscernibility of Identicals is a truism; but the Identity of Indiscernibles depends on possible identical worlds [Rey]
If two objects are indiscernible across spacetime, how could we decide whether or not they are the same? [Jubien]
The Indiscernibility of Identicals has been a big problem for modal logic [Fitting/Mendelsohn]
Identity of Indiscernibles (same properties, same thing) ) is not Leibniz's Law (same thing, same properties) [Lowe]
The identity of indiscernibles is necessarily true, if being a member of some set counts as a property [Sider]
Most philosophers think that the identity of indiscernibles is false [Moreland]
If only two indiscernible electrons exist, future differences must still be possible [Zimmerman,DW]
Discernible differences at different times may just be in counterparts [Zimmerman,DW]
The Identity of Indiscernibles is contentious for qualities, and trivial for non-qualities [Melia]
Leibniz's Law is about the properties of objects; the Identity of Indiscernibles is about perception of objects [Baggini /Fosl]
At different times Leibniz articulated three different versions of his so-called Law [Macdonald]
The Identity of Indiscernibles is false, because it is not necessarily true [Macdonald]
The notion of 'property' is unclear for a logical version of the Identity of Indiscernibles [Anderson,CA]