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Ideas for 'Axiomatic Theories of Truth (2005 ver)', 'Phil Applications of Cognitive Science' and 'Regressive Method for Premises in Mathematics'

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6. Mathematics / C. Sources of Mathematics / 4. Mathematical Empiricism / a. Mathematical empiricism

17628

Arithmetic was probably inferred from relationships between physical objects [Russell]

4044	Rat behaviour reveals a considerable ability to count [Goldman]