Combining Texts

You have chosen 'Counterpart theory and Quant. Modal Logic' by David Lewis, 'On Hippocrates and Plato' by Galen and 'On 'Generation and Corruption'' by Albert of Saxony

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