Combining Texts

You have chosen 'A Discourse on Method' by René Descartes, 'A Slim Book about Narrow Content' by Gabriel M.A. Segal and 'The Problem of Empty Names' by Marga Reimer

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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