Combining Texts

You have chosen 'Intro to Naming,Necessity and Natural Kinds' by Stephen P. Schwartz, 'The soul's dependence on the body' by Galen and 'The Establishment of Scientific Semantics' by Alfred Tarski

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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