Combining Texts

You have chosen 'Intro to Positive Philosophy' by Auguste Comte, 'The Logic of Infinity' by Henri Poincar and 'On Copernicanism and Relativity of Motion' by Gottfried Leibniz

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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