What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, if y were a bartender, then y is playing tennis. There is at least one y for which y will play tennis if and only if y is a bartender.
There is at least one y for which if y plays tennis, then y is a bartender. There is at least one y for which if y were a bartender, then y is playing tennis.