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