Combining Texts

You have chosen 'Open Society and Its Enemies:Hegel and Marx' by Karl Popper, 'To be is to be the value of a variable..' by George Boolos and 'History of Ancient Art' by Johann Winckelmann

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All the ideas for Knowledge Aims, or select a subheading:
      A. Knowledge
      B. Certain Knowledge
      C. Knowing Reality