What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is windy if and only if Patricia is a server. If it is windy, then Elisabeth is a bartender. Elisabeth is a police officer or Patricia is a server. If Elisabeth were a police officer, then it is windy.
If Elisabeth were a police officer, then Elisabeth is a bartender. If it is windy, then Patricia is a server. If Patricia were a server, then it is windy.