Combining Texts

You have chosen 'De primae philosophiae emendatione' by Gottfried Leibniz, 'Letters to Pierre Bayle' by Gottfried Leibniz and 'On the Foundations of Logic and Arithmetic' by David Hilbert

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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