Combining Texts

You have chosen 'Elements of Intuitionism (2nd ed)' by Michael Dummett, 'The Theory of Communicative Action' by Jürgen Habermas and 'A Specimen of Discoveries' by Gottfried Leibniz

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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