Combining Texts

You have chosen 'Thinking About Mechanisms' by Machamer,P/Darden,L/Craver,C, 'Material Beings' by Peter van Inwagen and 'works' by G.E. Moore

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All the ideas for Modality, or select a subheading:
      A. Necessity
      B. Possibility
      C. Sources of Modality
      D. Knowledge of Modality
      E. Possible worlds