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_10: Q_10(x_10) -> P_10(x_10). forall x_10: P_10(x_10) -> Q_10(x_10). q <-> P_10(a_5). forall x_10: ~Q_10(x_10).
q -> P_10(a_5) can be inferred via the biconditional elimination rule. P_10(a_5) -> q can be inferred via the biconditional elimination rule. forall x_10: ~P_10(x_10) can be inferred via the universal modus tollens rule. forall x_10: Q_10(x_10) <-> P_10(x_10) can be inferred via the universal biconditional introduction rule. forall x_10: P_10(x_10) <-> Q_10(x_10) can be inferred via the universal biconditional introduction rule.