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