What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Michael is driving a car and Patricia is listening to a song. If Karen were a writer, then Michael is driving a car. If Michael drives a car, then Karen is a writer.
Michael is driving a car. Patricia is listening to a song. Karen is a writer if and only if Michael is driving a car. Michael is driving a car if and only if Karen is a writer.