Combining Texts

You have chosen 'Open Society and Its Enemies:Hegel and Marx' by Karl Popper, 'Brains and Behaviour' by Hilary Putnam and 'Outline of a System of the Philosophy of Nature' by Friedrich Schelling

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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