<p>To double-track is to be both: counter-cultural and establishment, rich and poor, a bum with the keys to a country retreat, an exotic addition to the dinner table who still knows how to find their way around the silverware.<br>In the 1970s Tom Wolfe located the apex of doubletracking as the art world, but today, it's a cornerstone of the middle classes, and a full-blown commonplace of contemporary life. At root, it's a state of mind ...