Combining Texts

You have chosen 'On Body and Force, Against the Cartesians' by Gottfried Leibniz, 'Elements of Intuitionism (2nd ed)' by Michael Dummett and 'Critique of Practical Reason' by Immanuel Kant

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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