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_14: P(x_14) <-> S_14(x_14). w -> P(a_14). q_9. S_14(a_14) -> ~q_9. P(a_14) -> w.
~S_14(a_14) can be inferred via the modus tollens rule. forall x_14: P(x_14) -> S_14(x_14) can be inferred via the universal biconditional elimination rule. forall x_14: S_14(x_14) -> P(x_14) can be inferred via the universal biconditional elimination rule.