Combining Texts

You have chosen 'The Evolution of Logic' by William D. Hart, 'Logic and Epistemology of Causal Relations' by G.H. von Wright and 'Librium de interpretatione editio secunda' by Boethius

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All the ideas for Objects, or select a subheading:
      A. Existence of Objects
      B. Unity of Objects
      C. Structure of Objects
      D. Essence of Objects
      E. Objects over Time
      F. Identity among Objects