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: forall y: Q_1(y). forall y: T(y) -> S(y). forall y: W(y) <-> S(y). forall y: W(y) or T(y).
forall y: W(y) -> S(y) can be inferred via the universal biconditional elimination rule. forall y: S(y) -> W(y) can be inferred via the universal biconditional elimination rule.