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: S_10(a_10) <-> q_1. q_1 -> ~q_12. q_12. forall x_10: Q(x_10) -> S_10(x_10).
~q_1 can be inferred via the modus tollens rule. S_10(a_10) -> q_1 can be inferred via the biconditional elimination rule. q_1 -> S_10(a_10) can be inferred via the biconditional elimination rule.