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