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Ideas for 'Natural Kinds', 'Identity' and 'Two letters on mind'

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2 ideas

6. Mathematics / A. Nature of Mathematics / 2. Geometry

16949

Klein summarised geometry as grouped together by transformations [Quine]

6. Mathematics / A. Nature of Mathematics / 4. Using Numbers / c. Counting procedure

16014

It is controversial whether only 'numerical identity' allows two things to be counted as one [Noonan]