Combining Texts

You have chosen 'Frege's Theory of Numbers' by Charles Parsons, 'The Nature of Mental States' by Hilary Putnam and 'Principles of Nature and Grace based on Reason' by Gottfried Leibniz

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All the ideas for Science, or select a subheading:
      A. Basis of Science
      B. Scientific Theories
      C. Induction
      D. Explanation