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Ideas for 'fragments/reports', 'Vagaries of Definition' and 'Review of Frege's 'Grundlagen''

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6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / c. Fregean numbers

9992	The 'extension of a concept' in general may be quantitatively completely indeterminate [Cantor]

6. Mathematics / B. Foundations for Mathematics / 6. Mathematics as Set Theory / a. Mathematics is set theory

8203	All the arithmetical entities can be reduced to classes of integers, and hence to sets [Quine]