Combining Texts

You have chosen 'Letter to G.H. Schaller' by Baruch de Spinoza, 'Introduction to Zermelo's 1930 paper' by Michael Hallett and 'Questions on Aristotle's Posterior Analytics' by Jean Buridan

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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