Combining Texts

You have chosen 'Theory of Knowledge (2nd edn)' by Keith Lehrer, 'Representation and Reality' by Hilary Putnam and 'The Semantic Tradition from Kant to Carnap' by J. Alberto Coffa

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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