Combining Texts

You have chosen 'Function and Concept' by Gottlob Frege, 'The Later Works (17 vols, ed Boydston)' by John Dewey and 'A Combinatorial Theory of Possibility' by David M. Armstrong

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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