Combining Texts

You have chosen 'Frege's Concept of Numbers as Objects' by Crispin Wright, 'Oxford University Statutes' by Oxford Univ 1350 and 'On Body and Force, Against the Cartesians' 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