Combining Texts

You have chosen 'Writing the Book of the World' by Theodore Sider, 'Reference and Definite Descriptions' by Keith Donnellan and 'Fourfold Root of Princ of Sufficient Reason' by Arthur Schopenhauer

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