Combining Texts

You have chosen 'Reply to First Objections' by René Descartes, 'Proof of an External World' by G.E. Moore and 'Reasoning and the Logic of Things' by Charles Sanders Peirce

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