What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, if x_12 were rich, then x_12 is a nurse. If John were a nurse, then it is raining. For all x_12, x_12 is a police officer if and only if x_12 is rich.
For all x_12, if x_12 were a police officer, then x_12 is rich. For all x_12, if x_12 were rich, then x_12 is a police officer.