Combining Texts

You have chosen 'What is Logic?st1=Ian Hacking' by , 'Axiomatic Theories of Truth (2013 ver)' by Halbach,V/Leigh,G.E. and 'What is an Emotion?' by William James

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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