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: If Karen drives a car, then it is windy. For all x_10, if x_10 listens to a song, then x_10 is an electrician. Barbara is listening to a song or Karen is driving a car. If Barbara were an electrician, then it is windy.
Nothing can be inferred from these premises.