(Goddeau) Imagine Cactus Truck appearing at the Ghent Jazz Festival, around 10:00 PM, in a tent filled to the rafters. We’re willing to spend a month’s salary to witness that, because it’s guaranteed to cause some mayhem. And perhaps it will spur the eternal debate again: what is jazz and what isn’t? After all, where do you draw the line? Does it have to swing? Do you need blues charts?