What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 is a sailor if and only if x_9 will take a plane. If Michael were a sailor, then Michael is taking a plane.
For all x_9, if x_9 were a sailor, then x_9 is taking a plane. For all x_9, if x_9 takes a plane, then x_9 is a sailor.