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_25: R_25(x_25) and S_25(x_25). forall y_2: ~P(y_2). P(a_14) <-> r.
P(a_14) -> r can be inferred via the biconditional elimination rule. r -> P(a_14) can be inferred via the biconditional elimination rule. forall x_25: R_25(x_25) can be inferred via the universal simplification rule. forall x_25: S_25(x_25) can be inferred via the universal simplification rule.