What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If William climbs a mountain, then Joseph is sleeping. If Joseph sleeps, then Jessica is bored. For all x_13, x_13 will listen to a song if and only if x_13 will climb a mountain.
If William climbs a mountain, then Jessica is bored. For all x_13, if x_13 listens to a song, then x_13 is climbing a mountain. For all x_13, if x_13 climbs a mountain, then x_13 is listening to a song.