Combining Texts

You have chosen 'Changes in Events and Changes in Things' by Arthur N. Prior, 'Political Ideals' by Bertrand Russell and 'Three Dialogues of Hylas and Philonous' by George Berkeley

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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