Combining Texts

You have chosen 'Truth-makers' by Mulligan/Simons/Smith, 'Librium de interpretatione editio secunda' by Boethius and 'How Things Might Have Been' by Penelope Mackie

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