Is Jack Daniel's a bourbon?

Jack Daniel's is not considered a bourbon because it is charcoal-mellowed -- slowly, drop by drop, filtered through sugar-maple charcoal -- prior to aging, which many experts say gives it a different character. The process, called the Lincoln County Process, infuses a sweet and sooty character into the distillate as it removes impurities. But up to and after the charcoal filtering, the Jack Daniel's production is much the same as any other Bourbon. Jack Daniel's and George Dickel are two fine Tennessee Whiskeys though neither can be called bourbon.