What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If it is not cloudy, then Sarah is an artist. James is a bartender if and only if Sarah is a police officer. Sarah is not a police officer. If William were a scientist, then Sarah is not an artist. James is a bartender if and only if it is cloudy.
If James were a bartender, then Sarah is a police officer. If James were a bartender, then it is cloudy. If Sarah were a police officer, then James is a bartender. If it is cloudy, then James is a bartender. James is not a bartender.