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