Combining Texts

You have chosen 'General Facts,Phys Necessity, and Metaph of Time' by Peter Forrest, 'Conditional Assertion and Restricted Quantification' by Nuel D. Belnap and 'Does Emp.Knowledge have Foundation?' by Wilfrid Sellars

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All the ideas for Existence, or select a subheading:
      A. Nature of Existence
      B. Change in Existence
      C. Structure of Existence
      D. Theories of Reality
      E. Categories