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_8: P(x_8). forall x_8: U_4(x_8) -> ~P(x_8). forall x_8: U_4(x_8) or ~T(x_8).
exists x_8: ~U_4(x_8) can be inferred via the existential modus tollens rule. forall x_8: T(x_8) -> U_4(x_8) can be inferred via the universal rewriting rule.