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: exists x: R(x) -> S(x). forall x: S(x) <-> R(x).
forall x: S(x) -> R(x) can be inferred via the universal biconditional elimination rule. forall x: R(x) -> S(x) can be inferred via the universal biconditional elimination rule.