Combining Texts

You have chosen 'Are Freedom and Equality Compatible?' by G.A. Cohen, 'What is so bad about Contradictions?' by Graham Priest and 'Opus Maius (major works)' by Roger Bacon

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All the ideas for Natural Theory, or select a subheading:
      A. Speculations on Nature
      B. Natural Kinds
      C. Causation
      D. Laws of Nature