What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is cold if and only if it is windy. It is cold if and only if Charles is cooking. It is not windy.
If it is cold, then it is windy. If it is cold, then Charles is cooking. If it is windy, then it is cold. If Charles cooks, then it is cold. It is not cold.