From: DrDiettrich1@aol.com   
      
   SM Ryan wrote:   
      
   > The problem is you can't distinguish Boolean variable from arithmetic   
   > variable merely by looking variable characters themselves. You need to   
   > match the variable to its declaration and that requires a context   
   > sensitive grammar. In a context free grammar a Boolean variable and   
   > arithmetic variable (or function names) are indistinguishable hence   
   > the reduce-reduce conflict.   
      
   This was my impression as well. An arithmetic_expression is a special   
   case of a boolean_expression, slipping in by "relation". Adding a dummy   
   relation, which turns any arithmetic_expression (in detail   
   arithmetic_primary: variable, function_designator) into an   
   "boolean_primary", IMO would solve the syntax (context) problem.   
      
   DoDi   
      
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