Combining Texts

You have chosen 'Two Problems of Epistemology' by Karl Popper, 'Aristotle on Substance' by Mary Louise Gill and 'On the Moral and Legal State of Abortion' by Mary Anne Warren

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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