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, x_6 is not an electrician. For all x_6, x_6 is an electrician or x_6 will play tennis. For all x_6, x_6 is a doctor or x_6 will not play tennis.
For all x_6, x_6 will play tennis. For all x_6, if x_6 plays tennis, then x_6 is a doctor.