Combining Texts

You have chosen 'Truth and the Past' by Michael Dummett, 'Mathematical logic and theory of types' by Bertrand Russell and 'Intro to 'Self-Representational Consciousness'' by U Kriegel / K Williford

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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