What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 is a soldier or x_12 is fast. For all x_12, if x_12 were fast, then x_12 is a janitor. There is at least one x_12 for which x_12 is a janitor or x_12 is not a soldier.
There is at least one x_12 for which if x_12 were a soldier, then x_12 is a janitor.