Combining Texts

You have chosen 'Counterpart theory and Quant. Modal Logic' by David Lewis, 'An American Indian model of the Universe' by Benjamin Lee Whorf and 'Can there be Vague Objects?' by Gareth Evans

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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