Combining Texts

You have chosen 'The World as Will and Idea' by Arthur Schopenhauer, 'Lecture on Applicability of Mathematics' by Steven Weinberg and 'De Corpore (Elements, First Section)' by Thomas Hobbes

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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