Combining Texts

You have chosen 'Proof of an External World' by G.E. Moore, 'On the Conservation of Force' by Hermann von Helmholtz and 'Mr Strawson on Logical Theory' 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