Combining Texts

You have chosen 'New System and Explanation of New System' by Gottfried Leibniz, 'What is Mathematical Truth?' by Hilary Putnam and 'Justified Belief as Responsible Belief' by Richard Foley

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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