Combining Texts

You have chosen 'Letters to Remond de Montmort' by Gottfried Leibniz, 'The Good State' by A.C. Grayling and 'A Completeness Theorem in Modal Logic' by Saul A. Kripke

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All the ideas for Science, or select a subheading:
      A. Basis of Science
      B. Scientific Theories
      C. Induction
      D. Explanation