What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Sarah were a poet, then it is raining. It is windy if and only if it is raining. If it is overcast, then Sarah is a poet. It is not windy. It is overcast if and only if Patricia is sleeping.
If it is overcast, then it is raining. If it is windy, then it is raining. If it is overcast, then Patricia is sleeping. If it rains, then it is windy. If Patricia sleeps, then it is overcast. It is not raining.