Combining Texts

You have chosen 'Intro to 'Questions of Time and Tense'' by Robin Le Poidevin, 'Letters to Johann Bernoulli' by Gottfried Leibniz and 'A Plea for Excuses' by J.L. Austin

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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