Combining Texts

You have chosen 'On Duties ('De Officiis')' by M. Tullius Cicero, 'Structuralism and the Notion of Dependence' by ystein Linnebo and 'What Numbers Are' by Nicholas P. White

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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