Combining Texts

You have chosen 'The Evolution of Modern Metaphysics' by A.W. Moore, 'Boole calculus and the Concept script' by Gottlob Frege and 'Presidential Address of Am. Math. Soc' by Oswald Veblen

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All the ideas for Knowledge Criteria, or select a subheading:
      A. Justification Problems
      B. Internal Justification
      C. External Justification
      D. Scepticism
      E. Relativism