What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Richard were sad, then it is raining. Elisabeth is a musician if and only if it is raining. It is not cloudy or Richard is sad. Charles is not running or Elisabeth is a musician. Charles is running or it is cloudy.
It is cloudy or Elisabeth is a musician. If Elisabeth were a musician, then it is raining. If it rains, then Elisabeth is a musician.