Combining Texts

You have chosen 'Set Theory and related topics (2nd ed)' by Seymour Lipschutz, 'Philosophy and Politics' by Bertrand Russell and 'Elements of Mathematical Logic' by Jan Lukasiewicz

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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