Combining Texts

You have chosen 'works' by Augustus De Morgan, 'The Scientific Revolution 1500-1800' by A.R. Hall and 'Philosophy of Science: Very Short Intro (2nd ed)' by Samir Okasha

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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