Combining Texts

You have chosen 'Four Decades of Scientific Explanation' by Wesley Salmon, 'Medical Conceptions of Health pre-Renaissance' by Peter E. Pormann and 'On the Nature of the Gods ('De natura deorum')' by M. Tullius Cicero

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All the ideas for Modes of Existence, or select a subheading:
      A. Relations
      B. Properties
      C. Powers and Dispositions
      D. Universals
      E. Nominalism