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_8: T_4(x_8) <-> R(x_8). exists x_8: R(x_8) or ~T(x_8). forall x_8: T_4(x_8) or T(x_8).
exists x_8: T(x_8) -> R(x_8) can be inferred via the existential rewriting rule. forall x_8: T_4(x_8) -> R(x_8) can be inferred via the universal biconditional elimination rule. forall x_8: R(x_8) -> T_4(x_8) can be inferred via the universal biconditional elimination rule.