Combining Texts

You have chosen 'The Laws of Thought' by George Boole, 'Letters to the Lord Marquis of Newcastle' by Thomas Hobbes and 'Letters to Burcher De Volder' by Gottfried Leibniz

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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