Combining Texts

You have chosen 'Semantics, Conceptual Role' by Ned Block, 'To be is to be the value of a variable..' by George Boolos and 'Contemporary Political Philosophy (1st edn)' by Will Kymlicka

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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