Lots of half-understood old wive's tales and outright bullshit floating around here.
JD is definitely not whisky, because that's the traditional Scottish spelling... and JD is NOT Scotch whisky.
Nor is any other bourbon.
True Scotch is never made with any American corn/maize; bourbon is always made with at least 51% American corn, usually a much higher percentage.
That's the whole point... when scots/irish settlers came to what we now call Appalachia and the Middle South, they brought their highly-developed skills and technology with them, but found very little barley (or peat, for that matter). So they used plentiful, easy-to-grow and ferment/distill maize to make their liquor, instead.
Is JD bourbon?
Yes. Actual laws and trademark rules require anything labeled "bourbon" to be made from at least 51% corn, among other very specific guidelines.
Jack Daniel's fits within all of those guidelines, so yes, they could call it bourbon without telling a single lie.
JD is very much a "Tennessee whiskey", and there are even stricter laws and rules for that. Mostly involving charcoal-filtering, and aging requirements, as well as the grains used in the mash and other techniques.
So the upshot is, Yes all Tennessee whiskey is (technically) bourbon. But not every bourbon is Tennessee whiskey.
Strictly speaking, bourbon can only be made in Bourbon County, TN, and Lynchburg isn't in Bourbon Co.
Untrue. First of all, Bourbon County is in KY, not TN. More importantly, there is no legal or even cultural "rule" that bourbon must be made in Bourbon County.