There is a modern philosophical agreement that the hard problem depends on qualia by both proponents and critics. So when Daniel Dennett argues against David Chalmers, he attacks the definition of qualia. Or when Keith Frankish argues for illusionism, he attempts to show that consciousness is not actually qualia. And when Nagel says we don't know what it's like to be a bat, he means the bat qualia of echolocation (what it feels like when bats use echolocation to sense the world).