What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Jessica is a server if and only if it is windy. If it snows, then Barbara is a doctor. Jessica is a server if and only if Barbara is a doctor. If it is windy, then Jessica is rich.
If Jessica were a server, then it is windy. If Jessica were a server, then Barbara is a doctor. If it is windy, then Jessica is a server. If Barbara were a doctor, then Jessica is a server.