Combining Texts

You have chosen 'Summa totius logicae' by William of Ockham, 'Human Society in Ethics and Politics' by Bertrand Russell and 'Symbolic Logic (with Langford)' by C.I. Lewis

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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