Combining Texts

You have chosen 'Treatise on double arguments' by Anon (Diss), 'Essay Conc Human Understanding (2nd Ed)' by John Locke and 'Il Saggiatore ('The Assayer')' by Galileo Galilei

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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