Combining Texts

You have chosen 'People and Their Bodies' by Judith (Jarvis) Thomson, 'The Poverty of Philosophy' by Karl Marx and 'Mathematical logic and theory of types' by Bertrand Russell

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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