What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, if x_5 were a soldier, then x_5 is a police officer. There is at least one x_5 for which if x_5 were a doctor, then x_5 is a mechanic. For all x_5, if x_5 were a mechanic, then x_5 is a police officer. For all x_5, if x_5 plays tennis, then x_5 is a soldier. For all x_5, x_5 is a doctor or x_5 will play tennis.
For all x_5, if x_5 plays tennis, then x_5 is a police officer. There is at least one x_5 for which if x_5 were a doctor, then x_5 is a police officer.