Combining Texts

You have chosen 'On the True Doctrine (Against Christians)' by Celsus, 'Causation and Laws of Nature' by Jonathan Schaffer and 'Justified Belief as Responsible Belief' by Richard Foley

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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