Combining Texts

You have chosen 'Nominalism and Substitutional Quantifiers' by Ruth Barcan Marcus, 'Set Theory and Its Philosophy' by Michael Potter and 'The Ego and Its Own' by Max Stirner

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All the ideas for Existence, or select a subheading:
      A. Nature of Existence
      B. Change in Existence
      C. Structure of Existence
      D. Theories of Reality
      E. Categories