Combining Texts

You have chosen 'New System and Explanation of New System' by Gottfried Leibniz, 'Identity and Existence in Logic' by C. Anthony Anderson and 'The Idea of Equality' by Bernard Williams

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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