[pshreck]

Last 2 posters are both wrong. It is by definition, a bourbon, although it is never really referred to as one.

Tennessee whiskey is a kind of bourbon, as it is made from fermented mash.

EDIT:

Interesting, there is actually an argument over the clear definition of Bourbon, and some people think there is one slight difference ( in terms of aging) that makes Tennesse Whiskey not classifiable as such.

So without a clear defintion of the term, neither is right.