Combining Texts

You have chosen 'Exigency to Exist in Essences' by Gottfried Leibniz, 'Trees, Terms and Truth' by George Engelbretsen and 'Elements of Set Theory' by Herbert B. Enderton

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All the ideas for Ethics, or select a subheading:
      A. Egoism
      B. Contract Ethics
      C. Virtue Theory
      D. Deontological Ethics
      E. Utilitarianism
      F. Existentialism