Combining Texts

You have chosen 'The Gettier Problem' by Stephen Hetherington, 'Real Natures and Familiar Objects' by Crawford L. Elder and 'A Tour through Mathematical Logic' by Robert S. Wolf

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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