Combining Texts

You have chosen 'Frege's Concept of Numbers as Objects' by Crispin Wright, 'The Essential Child' by Susan A. Gelman and 'Identity, Essence and Indiscernibility' by Stephen Yablo

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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