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