What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If it is sunny, then Patricia is working. Patricia is working if and only if it is cloudy. If Patricia works, then it is sunny.
It is sunny if and only if Patricia is working. Patricia is working if and only if it is sunny. If Patricia works, then it is cloudy. If it is cloudy, then Patricia is working.