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 will cook. For all x_6, if x_6 cooks, then x_6 is driving a car. Mary is not driving a car or Barbara is a police officer.
For all x_6, x_6 will drive a car can be inferred via the universal modus ponens rule.