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 cooks, then y is playing squash. For all y, y will cook if and only if y will play squash. There is at least one y for which if y cooks, then y is a carpenter.
For all y, if y cooks, then y is playing squash. For all y, if y plays squash, then y is cooking.