Combining Texts

You have chosen 'Lectures on Ethics' by Immanuel Kant, 'Proof that every set can be well-ordered' by Ernst Zermelo and 'Grounding: an opinionated introduction' by Correia,F/Schnieder,B

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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