Combining Texts

You have chosen 'Intro to G��del's Theorems' by Peter Smith, 'Letters from a Stoic' by Seneca the Younger and 'Remarks on the forces of inorganic Nature' by J.R. Mayer

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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