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: P(x) <-> Q(x). Q(a_14) or r. ~P(a_14).
forall x: P(x) -> Q(x) can be inferred via the universal biconditional elimination rule. forall x: Q(x) -> P(x) can be inferred via the universal biconditional elimination rule.