Combining Texts

You have chosen 'A General Principle to Explain Laws of Nature' by Gottfried Leibniz, 'Preface to 'Principles of Philosophy'' by Ren Descartes and 'Why Constitution is not Identity' by Lynne Rudder Baker

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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