Combining Texts

You have chosen 'The Evolution of Logic' by William D. Hart, 'Phaedrus' by Plato and 'Aristotle and Descartes on Matter' 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