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_3 <-> q_12. ~q_12. s_4.
~q_12 and s_4 can be inferred via the conjunction rule. s_4 and ~q_12 can be inferred via the conjunction rule. q_3 -> q_12 can be inferred via the biconditional elimination rule. q_12 -> q_3 can be inferred via the biconditional elimination rule. ~q_3 can be inferred via the biconditional elimination rule.