Combining Texts

You have chosen 'Do Conditionals Have Truth Conditions?' by Dorothy Edgington, 'Frege on Apriority (with ps)' by Tyler Burge and 'Two Chief World Systems' by Galileo Galilei

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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