Combining Texts

You have chosen 'Croce and Collingwood' by Gary Kemp, 'Alfred Tarski: life and logic' by Feferman / Feferman and 'Introduction to 'Absolute Generality'' by Rayo,A/Uzquiasno,G

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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