Combining Texts

You have chosen 'The Ultimate Constituents of Matter' by Bertrand Russell, 'Reflections on my Critics' by Thomas S. Kuhn and 'Sources of Knowledge of Mathematics' by Gottlob Frege

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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