Combining Texts

You have chosen 'On 'Generation and Corruption'' by Giles of Orleans, 'The Principles of Art' by R.G. Collingwood and 'On the Nature of Truth and Falsehood' by Bertrand Russell

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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