Some of the best moments on The Cool hearken back to the nimble mischief of A Tribe Called Quest; “Paris, Tokyo” is Lupe’s holler-back to Tribe’s classic “Award Tour,” while “Gold Watch,” with its tricky beat and trickier rhymes, might be the album’s best song. As his music grows beyond the simple nostalgia of his 2006 hit “Kick, Push,” Lupe weaves what are easily mainstream rap’s most ambitious verses