Combining Texts

You have chosen 'Questions on Aristotle's Physics' by Jean Buridan, 'Of liberty, Fate and God's grace' by Gottfried Leibniz and 'Reply to Fourth Objections' by Ren Descartes

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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