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_5: T_2(x_5) -> Q_5(x_5). forall x_5: Q(x_5) -> Q_5(x_5). exists x_5: T_2(x_5) or Q(x_5). forall x_5: Q_5(x_5) -> T_2(x_5).
forall x_5: Q(x_5) -> T_2(x_5) can be inferred via the universal transitivity rule. exists x_5: Q_5(x_5) can be inferred via the existential disjunction elimination rule. forall x_5: T_2(x_5) <-> Q_5(x_5) can be inferred via the universal biconditional introduction rule. forall x_5: Q_5(x_5) <-> T_2(x_5) can be inferred via the universal biconditional introduction rule.