What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is not raining. If it is windy, then Thomas is an electrician. If Thomas were a scientist, then it is raining. If it rains, then Thomas is a scientist. If Thomas were an electrician, then Thomas is a scientist.
Thomas is not a scientist. If it is windy, then Thomas is a scientist. If Thomas were an electrician, then it is raining. Thomas is a scientist if and only if it is raining. It is raining if and only if Thomas is a scientist.