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 <-> q_17. p_5 and r. ~q_17.
p_5 can be inferred via the simplification rule. r can be inferred via the simplification rule. q -> q_17 can be inferred via the biconditional elimination rule. q_17 -> q can be inferred via the biconditional elimination rule. ~q can be inferred via the biconditional elimination rule.