Combining Texts

You have chosen 'Writing the Book of the World' by Theodore Sider, 'The Epistemology of Modality' by Anand Vaidya and 'A Tour through Mathematical Logic' by Robert S. Wolf

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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