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). S(d) <-> r. forall x_10: Q_10(x_10) -> S(x_10). forall x_10: S(x_10) -> Q_10(x_10).
S(d) -> r can be inferred via the biconditional elimination rule. r -> S(d) can be inferred via the biconditional elimination rule. forall x_10: ~S(x_10) can be inferred via the universal modus tollens rule. forall x_10: Q_10(x_10) <-> S(x_10) can be inferred via the universal biconditional introduction rule. forall x_10: S(x_10) <-> Q_10(x_10) can be inferred via the universal biconditional introduction rule.