Was Wilco singer/songwriter Jeff Tweedy right when he claimed in Sam Jones’ documentary, I am Trying to Break Your Heart, that a band needs a single leader? Does, as Tweedy said, a “circle need a center” after all? Makes sense, right? Art needs a clear direction, right? But wait, what about Sonic Youth? Doesn’t their circle have, like, two and a half centers, maybe three? And aren’t they, along with U2, a rock band that has remained artistically relevant for over a quarter century while maintaining the same lineup? Clearly, Tweedy’s theory only works when convenient.