Combining Texts

You have chosen 'Aesthetic as Science of Expression' by Benedetto Croce, 'Frege on Apriority (with ps)' by Tyler Burge and 'Letters to Edward Stillingfleet' by John Locke

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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