What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_3, x_3 is not an artist. For all x_3, x_3 will not listen to a song or x_3 is an office clerk. For all x_3, x_3 is a cashier if and only if x_3 is an artist. There is at least one x_3 for which x_3 will listen to a song or x_3 is a cashier.
There is at least one x_3 for which x_3 is a cashier or x_3 is an office clerk. For all x_3, if x_3 were a cashier, then x_3 is an artist. For all x_3, if x_3 were an artist, then x_3 is a cashier. For all x_3, x_3 is not a cashier.