Combining Texts

You have chosen 'The Limits of Abstraction' by Kit Fine, 'System of Logic' by John Stuart Mill and 'Explanatory Coherence' by Paul Thagard

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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