Combining Texts

You have chosen 'The Sayings of Confucius' by Confucius, 'Remarks on the forces of inorganic Nature' by J.R. Mayer and 'Fact, Fiction and Forecast (4th ed)' by Nelson Goodman

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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