Combining Texts

You have chosen 'The Problem of Empty Names' by Marga Reimer, 'The Trouble with Possible Worlds' by William Lycan and 'Identity in Substances and True Propositions' 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