On the surface, the Descendents seem like goofball heroes — spastic, caffeinated kids of the black hole that effortlessly spun lovelorn punk songs like “Hope” and spawned 100,000 band wannabes. Yet their intelligence and inventiveness still run wide and deep. Influenced by everything from first-wavers like the Alley Cats to the experimental contortions of avant-garde jazz pioneer Ornette Coleman, their music defies all boundaries and norms, becoming some kind of volatile hybrid. Meanwhile, their new tunes, for instance “Feel This,” emote like powerhouse punk-pop with bite and gritty propulsion; “No Fat Burger” burns just as hard and fast as their classics while weighing the tribulations of adulthood (like avoiding bypass surgery!), and “Human Being” addresses homelessness and nuclear warheads in less than one minute. As always, they manage the seemingly impossible: a commitment to uncompromising musicality and lyrics that tuck in heartache as well as barbed and insightful sarcasm, which is all underpinned by swells of conscience.