Combining Texts

You have chosen 'Logicism, Some Considerations (PhD)' by Paul Benacerraf, 'The Concept of Mind' by Gilbert Ryle and 'Introduction to the Philosophy of Mathematics' by Mark Colyvan

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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