Combining Texts

You have chosen 'Must We Believe in Set Theory?st1=George Boolos' by , 'Nominalism' by Zoltn Gendler Szab and 'Answer to 'What is Enlightenment?'' by Immanuel Kant

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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