Combining Texts

You have chosen 'What is so bad about Contradictions?' by Graham Priest, 'Grundlagen der Arithmetik (Foundations)' by Gottlob Frege and 'Getting Causes from Powers' by S.Mumford/R.Lill Anjum

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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