What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, x_6 will play squash or x_6 will not work. There is at least one x_6 for which x_6 will take a plane. For all x_6, x_6 will work.
There is at least one x_6 for which x_6 will take a plane and x_6 will work. There is at least one x_6 for which x_6 will work and x_6 will take a plane. For all x_6, if x_6 works, then x_6 is playing squash.