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_6, x_6 is not a police officer or x_6 will drive a car. There is at least one x_6 for which x_6 is excited. For all x_6, if x_6 were excited, then x_6 is a police officer.
There is at least one x_6 for which x_6 is a police officer can be inferred via the existential modus ponens rule.