Combining Texts

You have chosen 'Wittgenstein on Rules and Private Language' by Saul A. Kripke, 'Of Organum or Ars Magna of Thinking' by Gottfried Leibniz and 'System of Logic' by John Stuart Mill

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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