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