Combining Texts

You have chosen 'Dialogue on human freedom and origin of evil' by Gottfried Leibniz, 'Boole calculus and the Concept script' by Gottlob Frege and 'Plural Quantification Exposed' by ystein Linnebo

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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