Combining Texts

You have chosen 'A Puzzle about Belief' by Saul A. Kripke, 'The Universe as We Find It' by John Heil and 'Building Blocks of Mathematical Logic' by Moses Schnfinkel

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All the ideas for Natural Reality, or select a subheading:
      A. Classical Physics
      B. Modern Physics
      C. Space
      D. Time
      E. Cosmology
      F. Chemistry
      G. Biology