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