Combining Texts

You have chosen 'Abstract Objects: a Case Study' by Stephen Yablo, 'Constructibility and Mathematical Existence' by Charles Chihara and 'The Fourth Revolution' by Micklethwait,J/Wooldridge,A

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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