What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? David is a musician if and only if it is raining. It is overcast if and only if Thomas is driving a car. If Thomas drives a car, then it is raining. David is not a musician.
If David were a musician, then it is raining. If it is overcast, then Thomas is driving a car. If it rains, then David is a musician. If Thomas drives a car, then it is overcast. It is not raining.