What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 is not a carpenter. For all x_9, x_9 will listen to a song or x_9 is a server. There is at least one x_9 for which if x_9 sleeps, then x_9 is a carpenter. For all x_9, x_9 will sleep if and only if x_9 will listen to a song.
There is at least one x_9 for which x_9 will not sleep. For all x_9, if x_9 sleeps, then x_9 is listening to a song. For all x_9, if x_9 listens to a song, then x_9 is sleeping.