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Single Idea 18851

[filed under theme 4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / c. Axiom of Pairing II ]

Full Idea

In conjunction with Extensionality, Pairing entails that given a single non-set, infinitely many sets exist.

Gist of Idea

Pairing (with Extensionality) guarantees an infinity of sets, just from a single element

Source

Gideon Rosen (The Limits of Contingency [2006], 04)

Book Ref

'Identity and Modality', ed/tr. MacBride,Fraser [OUP 2006], p.18


The 11 ideas from 'The Limits of Contingency'

Metaphysical necessity is absolute and universal; metaphysical possibility is very tolerant [Rosen]
'Metaphysical' modality is the one that makes the necessity or contingency of laws of nature interesting [Rosen]
Something may be necessary because of logic, but is that therefore a special sort of necessity? [Rosen]
Pairing (with Extensionality) guarantees an infinity of sets, just from a single element [Rosen]
A Meinongian principle might say that there is an object for any modest class of properties [Rosen]
A proposition is 'correctly' conceivable if an ominiscient being could conceive it [Rosen]
The MRL view says laws are the theorems of the simplest and strongest account of the world [Rosen]
Combinatorial theories of possibility assume the principles of combination don't change across worlds [Rosen]
Sets, universals and aggregates may be metaphysically necessary in one sense, but not another [Rosen]
Standard Metaphysical Necessity: P holds wherever the actual form of the world holds [Rosen]
Non-Standard Metaphysical Necessity: when ¬P is incompatible with the nature of things [Rosen]