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_7: Q_7(x_7) -> R_7(x_7). forall x_7: ~R_1(x_7). forall x_7: R_7(x_7) -> R_1(x_7). forall x_7: W(x_7) -> Q_7(x_7).
forall x_7: ~R_7(x_7) can be inferred via the universal modus tollens rule. exists x_7: Q_7(x_7) -> R_1(x_7) can be inferred via the existential transitivity rule. exists x_7: W(x_7) -> R_7(x_7) can be inferred via the existential transitivity rule.