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