Combining Texts

You have chosen 'Writing the Book of the World' by Theodore Sider, 'Letters to Pierre Bayle' by Gottfried Leibniz and 'Counterparts and Identity' by Robert C. Stalnaker

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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