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