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Full Idea
If God creates a globe reached by travelling two diameters in a straight line from another globe, this can be described as two globes in Euclidean space, or a single globe in a tightly curved non-Euclidean space.
Gist of Idea
Black's two globes might be one globe in highly curved space
Source
Robert Merrihew Adams (Primitive Thisness and Primitive Identity [1979], 3)
Book Ref
'Metaphysics - An Anthology', ed/tr. Sosa,E. /Kim,J. [Blackwell 1999], p.177
A Reaction
[my compression of Adams's version of Hacking's response to Black, as spotted by Stalnaker] Hence we save the identity of indiscernibles, by saying we can't be sure that two indiscernibles are not one thing, unusually described.