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Single Idea 21554

[catalogued under 5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / b. Cantor's paradox]

Full Idea

Cantor proved that the number of sets in a collection of terms is larger than the number of terms. Hence Cantor's Paradox says the number of sets in the collection of all sets must be larger than the number of sets in the collection of all sets.

Gist of Idea

Sets always exceed terms, so all the sets must exceed all the sets

Source

Douglas Lackey (Intros to Russell's 'Essays in Analysis. [1973], p.127)

A Reaction

The sets must count as terms in the next iteration, but that is a normal application of the Power Set axiom.

Book Reference

Russell,Bertrand: 'Essays in Analysis', ed/tr. Lackey,Douglas [George Braziller 1973], p.127