What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is snowing if and only if John is an electrician. If it snows, then it is late. If it is late, then John is an electrician.
If it snows, then John is an electrician. If it snows, then John is an electrician. If John were an electrician, then it is snowing.