Combining Texts

You have chosen 'Treatise on double arguments' by Anon (Diss), 'Principles of Nature and Grace based on Reason' by Gottfried Leibniz and 'The Fourth Revolution' by Micklethwait,J/Wooldridge,A

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All the ideas for Knowledge Sources, or select a subheading:
      A. A Priori Knowledge
      B. Perception
      C. Rationalism
      D. Empiricism
      E. Direct Knowledge