Combining Texts

You have chosen 'Changes in Events and Changes in Things' by Arthur N. Prior, 'Liberal Individualism and Liberal Neutrality' by Will Kymlicka and 'On the Principles of Indiscernibles' by Gottfried Leibniz

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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