Combining Texts

You have chosen 'The Logic of Infinity' by Henri Poincaré, 'Frege on Knowing the Foundations' by Tyler Burge and 'Matter and Motion Cannot Think' by Richard Bentley

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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