Combining Texts

You have chosen 'Letters to Wolff' by Gottfried Leibniz, 'Perceptual experience has conceptual content' by Bill Brewer and 'Regressive Method for Premises in Mathematics' by Bertrand Russell

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