What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, x_5 will work. For all x_5, x_5 will take a plane or x_5 is not a sailor. There is at least one x_5 for which if x_5 works, then x_5 is taking a plane.
There is at least one x_5 for which x_5 will take a plane. For all x_5, if x_5 were a sailor, then x_5 is taking a plane.