Combining Texts

You have chosen 'What is so bad about Contradictions?' by Graham Priest, 'Probability and Logic of Rational Belief' by Henry E. Kyburg Jr and 'Looking for Spinoza' by Antonio Damasio

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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