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