From: kaz@kylheku.com   
      
   On 2014-06-20, Ivan Godard  wrote:   
   > VWG is vastly superior to BNF because it provides a formal specification   
   > of semantics, in particular the type system, which cannot be expressed   
   > in BNF.   
      
   How do you put this into VWG, semantics and all:   
      
     (lisp-macro with (mystery arguments))   
      
   :)   
      
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