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: q_10 -> ~p_4. q_10 -> u_1. p_4. u_1 <-> q_10.
~q_10 can be inferred via the modus tollens rule. u_1 -> q_10 can be inferred via the biconditional elimination rule. q_10 -> u_1 can be inferred via the biconditional elimination rule.