Single Idea 15506

[catalogued under 4. Formal Logic / F. Set Theory ST / 3. Types of Set / c. Unit (Singleton) Sets]

Full Idea

Our utter ignorance about the nature of the singletons amounts to sheer ignorance about the nature of classes generally.

Gist of Idea

If we don't understand the singleton, then we don't understand classes

Source

David Lewis (Parts of Classes [1991], 2.1)

Book Reference

Lewis,David: 'Parts of Classes' [Blackwell 1991], p.31

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