Combining Texts

You have chosen 'Writing the Book of the World' by Theodore Sider, 'An Axiomatization of Set Theory' by John von Neumann and 'Aspects of the Theory of Syntax' by Noam Chomsky

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All the ideas for Objects, or select a subheading:
      A. Existence of Objects
      B. Unity of Objects
      C. Structure of Objects
      D. Essence of Objects
      E. Objects over Time
      F. Identity among Objects