Combining Texts

You have chosen '(Nonsolipsistic) Conceptual Role Semantics' by Gilbert Harman, 'The Nature of Necessity' by Alvin Plantinga and 'A Mathematical Introduction to Logic (2nd)' by Herbert B. Enderton

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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