Combining Texts

You have chosen 'The Inference to the Best Explanation' by Gilbert Harman, 'Model Theory for Modal Logic I' by Kit Fine and 'Purple Haze' by Joseph Levine

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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