What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_9 for which x_9 is rich if and only if x_9 will work. For all x_9, x_9 is rich if and only if x_9 will take a plane. For all x_9, x_9 will work or x_9 will take a plane.
For all x_9, if x_9 were rich, then x_9 is taking a plane. There is at least one x_9 for which if x_9 were rich, then x_9 is working. For all x_9, if x_9 takes a plane, then x_9 is rich. There is at least one x_9 for which if x_9 works, then x_9 is rich.