Combining Texts

You have chosen 'Principles of Theoretical Logic' by Hilbert,D/Ackermann,W, 'The Theory of Relativity and A Priori Knowledge' by Hans Reichenbach and 'How to Define Theoretical Terms' by David Lewis

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All the ideas for Action, or select a subheading:
      A. Definition of Action
      B. Preliminaries of Action
      C. Motives for Action