Combining Texts

You have chosen 'Presidential Address of Am. Math. Soc' by Oswald Veblen, 'In Defense of Essentialism' by L.A. Paul and 'New Foundations for Mathematical Logic' by Willard Quine

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