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_14, if x_14 drives a car, then x_14 is playing a game. If Jessica were an astronaut, then Linda is driving a car. Jessica is an astronaut or John is a janitor. If John were a janitor, then Linda is driving a car.
Nothing can be inferred from these premises.