That's fighting words about Tennessee whiskey where I'm from. ;)
Also, yes, the legal qualifier I forgot (because I just assume it, given where I'm from) was the post-Rectifier term "straight Bourbon", which has:
1) Stricter Age requirements. Which most Tennessee whiskey likely doesn't meet, though without age statements who is to say, eh? Charcoal goes a long way to cover immaturity, which is why it was in the Rectifier playbook in the first place. None of the mass labels today are probably dumb enough to sell anything Rectifier bad like 6 weeks old charcoal vodka, don't get me wrong.
2) Straight Bourbon also has very strict additive rules, which Charcoal definitely doesn't meet.