Combining Texts

You have chosen 'Changes in Events and Changes in Things' by Arthur N. Prior, 'A World of States of Affairs' by David M. Armstrong and 'Theses on Feuerbach' by Karl Marx

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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