What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_14 for which x_14 will work or x_14 will play squash. For all x_14, if x_14 works, then x_14 is listening to a song. For all x_14, if x_14 listens to a song, then x_14 is working. For all x_14, x_14 will not listen to a song.
For all x_14, x_14 will not work. For all x_14, x_14 will work if and only if x_14 will listen to a song. For all x_14, x_14 will listen to a song if and only if x_14 will work.