What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, if x plays squash, then x is poor. There is at least one x for which if x were poor, then x is playing squash. For all x, x will play squash or x will not go running.
For all x, if x goes running, then x is playing squash. There is at least one x for which x is poor if and only if x will play squash. There is at least one x for which x will play squash if and only if x is poor.