What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If William were excited, then it is not snowing. It is raining if and only if James is a sailor. It is snowing. James is a sailor if and only if William is excited.
William is not excited. If it rains, then James is a sailor. If James were a sailor, then William is excited. If James were a sailor, then it is raining. If William were excited, then James is a sailor.