Are there any range concatenation grammars that

  1. generate only one possible parse tree
  2. are not also context-free?
  • 1
    $\begingroup$ Write a grammar for $\{a^nb^nc^n\mid n>0\}$. Chances are it will be unambiguous. $\endgroup$ – Sylvain Aug 15 '17 at 18:50

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