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: There is at least one x_5 for which x_5 is not a bartender. For all x_5, if x_5 goes running, then x_5 is not a police officer. For all x_5, x_5 is a bartender or x_5 is a police officer.
There is at least one x_5 for which x_5 is a police officer can be inferred via the existential disjunctive syllogism rule.