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 x_3: S_2(x_3) -> T(x_3). exists x_3: R(x_3) -> T(x_3). forall x_3: S_2(x_3) or R(x_3). forall x_3: S(x_3).
exists x_3: T(x_3) can be inferred via the existential disjunction elimination rule.