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Ideas for 'Logic (Encyclopedia I)', 'W.V. Quine' and 'Mathematical Methods in Philosophy'

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6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / b. Types of number

8454	The whole numbers are 'natural'; 'rational' numbers include fractions; the 'reals' include root-2 etc. [Orenstein]

6. Mathematics / C. Sources of Mathematics / 6. Logicism / a. Early logicism

8473	The logicists held that is-a-member-of is a logical constant, making set theory part of logic [Orenstein]