Combining Texts

You have chosen 'Preface to 'De Revolutionibus'' by Andreas Osiander, 'Varieties of Things' by Cynthia Macdonald and 'Our Knowledge of Mathematical Objects' by Kit Fine

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