Combining Texts

You have chosen 'On Hippocrates and Plato' by Galen, 'The Fourth Revolution' by Micklethwait,J/Wooldridge,A and 'Opus Maius (major works)' by Roger Bacon

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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