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 Richard is running. If Richard goes running, then John is an office clerk. Charles is not a nurse. If James works, then it is not cloudy. Charles is a nurse or it is cloudy. If it is sunny, then John is an office clerk.
It is cloudy. John is an office clerk.