Combining Texts

You have chosen 'Frege's Concept of Numbers as Objects' by Crispin Wright, 'Groundwork of the Metaphysic of Morals' by Immanuel Kant and 'Boole calculus and the Concept script' by Gottlob Frege

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      A. Basis of Science
      B. Scientific Theories
      C. Induction
      D. Explanation