Combining Texts

You have chosen 'What do powers do when they are not manifested?' by Stathis Psillos, 'The Languages of Art' by Nelson Goodman and 'Introduction to Mathematical Logic' by Michal Walicki

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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