Combining Texts

You have chosen 'An Analysis of Knowledge and Valuation' by C.I. Lewis, 'On the Question of Absolute Undecidability' by Peter Koellner and 'De Veritate (On Truth)' by Anselm

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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