From: Jens.Schmidt-HH@gmx.de   
      
   Marc wrote:   
      
   > I have often seen operator== return something that is not bool, but I   
   > can't remember ever seing operator!= do something significantly   
   > different from !operator==.   
      
   What about floating point? Comparisons with NaN result in neither   
   equal nor unequal, but unordered.   
   --   
   Greetings,   
      Jens Schmidt   
      
      
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