Combining Texts

You have chosen 'Writing the Book of the World' by Theodore Sider, 'Building Blocks of Mathematical Logic' by Moses Schnfinkel and 'Knowing One's Own Mind' by Donald Davidson

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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