What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all x_8, x_8 will take a plane or x_8 will work. For all x_8, if x_8 works, then x_8 is a police officer. For all x_8, if x_8 takes a plane, then x_8 is a police officer. For all x_8, x_8 will play tennis and x_8 is a musician.
For all x_8, x_8 will play tennis can be inferred via the universal simplification rule. For all x_8, x_8 is a musician can be inferred via the universal simplification rule. For all x_8, x_8 is a police officer can be inferred via the universal disjunction elimination rule.