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: Michael is a doctor or Karen is not driving a car. Karen is driving a car if and only if Michael is a doctor. Karen is not driving a car.
If Karen drives a car, then Michael is a doctor can be inferred via the rewriting rule. If Karen drives a car, then Michael is a doctor can be inferred via the biconditional elimination rule. If Michael were a doctor, then Karen is driving a car can be inferred via the biconditional elimination rule. Michael is not a doctor can be inferred via the biconditional elimination rule.