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