Combining Texts

You have chosen 'On the Nature of the Gods ('De natura deorum')' by M. Tullius Cicero, 'Logical Necessity' by Ian Rumfitt and 'Exigency to Exist in Essences' by Gottfried Leibniz

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All the ideas for Natural Reality, or select a subheading:
      A. Classical Physics
      B. Modern Physics
      C. Space
      D. Time
      E. Cosmology
      F. Chemistry
      G. Biology