What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, x is bored if and only if x is a janitor. For all x, if x were a janitor, then x is bored. For all x, x is bored or x is not a janitor.
For all x, if x were a janitor, then x is bored. For all x, if x were bored, then x is a janitor. For all x, if x were a janitor, then x is bored.