Combining Texts

You have chosen 'Defending the Axioms' by Penelope Maddy, 'The Passions of the Soul' by Ren Descartes and 'A Powers Theory of Modality' by Jonathan D. Jacobs

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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