Combining Texts

You have chosen 'Are there propositions?' by Gilbert Ryle, 'On the Question of Absolute Undecidability' by Peter Koellner and 'The Logic of Scientific Discovery' by Karl Popper

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All the ideas for Reason, or select a subheading:
      A. Nature of Reason
      B. Laws of Thought
      C. Styles of Reason
      D. Definition
      E. Argument
      F. Fallacies