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 for which x will go running if and only if x will play squash. For all x, x will not go running. For all x, x will play a game if and only if x will play squash.
For all x, if x plays a game, then x is playing squash. There is at least one x for which if x goes running, then x is playing squash. For all x, if x plays squash, then x is playing a game. There is at least one x for which if x plays squash, then x is running. There is at least one x for which x will not play squash.