Combining Texts

You have chosen 'Letters to Johann Bernoulli' by Gottfried Leibniz, 'Four Decades of Scientific Explanation' by Wesley Salmon and 'The Aim and Structure of Physical Theory' by Pierre Duhem

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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