Combining Texts

You have chosen 'Survival and Identity, with postscript' by David Lewis, 'Frege's Theory of Numbers' by Charles Parsons and 'Events and Semantic Architecture' by Paul M. Pietroski

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