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Quote: 0 is a number because any relation, including identity, is a 1-1 relation for concepts under which no object falls
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Topic:
number as the extension of a class of equinumerous classes
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Now it must be possible to prove, by … is equal to every other concept under which … which belongs to any such concept, and that … … we have to find a relation \phi which … an object which falls under G; and [vice versa] … it follows, on our assumption [that no object falls under either concept], that these … Google-1 Google-2
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Topic: number as the extension of a class of equinumerous classes (23 items)