Combining Texts

You have chosen 'Introduction to Mathematical Logic' by Michal Walicki, 'The Idea of Justice' by Amartya Sen and 'Intro to 'Provenance of Pure Reason'' by William W. Tait

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All the ideas for Natural Theory, or select a subheading:
      A. Speculations on Nature
      B. Natural Kinds
      C. Causation
      D. Laws of Nature