What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 listens to a song, then x_6 is a musician. If William were a mechanic, then William is listening to a song. For all x_6, if x_6 were a musician, then x_6 is a mechanic.
For all x_6, if x_6 listens to a song, then x_6 is a mechanic.