What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If John were fast, then John is playing squash. For all x_9, x_9 will play squash if and only if x_9 is fast.
For all x_9, if x_9 plays squash, then x_9 is fast. For all x_9, if x_9 were fast, then x_9 is playing squash.