The essay isn’t trying to solve the hard problem of consciousness. It is trying to demonstrate the impossibility of p-zombies. Consciousness is not “redefined” as something experimentally detectable; it is simply pointed out that consciousness defined the usual way is, in fact, experimentally detectable, since we can catch ourselves in the act of listening and visibly move our lips to report it.
The essay isn’t trying to solve the hard problem of consciousness. It is trying to demonstrate the impossibility of p-zombies. Consciousness is not “redefined” as something experimentally detectable; it is simply pointed out that consciousness defined the usual way is, in fact, experimentally detectable, since we can catch ourselves in the act of listening and visibly move our lips to report it.