Combining Texts

You have chosen 'A Problem about Substitutional Quantification?st1=Saul A. Kripke' by , 'On Aristotle's 'Metaphysics'' by Thomas Aquinas and 'On the Nature of Truth and Falsehood' by Bertrand Russell

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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