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 play tennis or x will not play squash. For all x, x will play squash if and only if x will play tennis.
There is at least one x for which if x plays squash, then x is playing tennis. For all x, if x plays squash, then x is playing tennis. For all x, if x plays tennis, then x is playing squash.