Combining Texts

You have chosen 'On 'Generation and Corruption'' by Nicole Oresme, 'The Barcan Formula and Metaphysics' by Ori Simchen and 'Introduction to 'Virtues of Authenticity'' by Alexander Nehamas

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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