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. ~t. ~q_17. t or w.
w can be inferred via the disjunctive syllogism rule. ~t and ~q_17 can be inferred via the conjunction rule. ~q_17 and ~t can be inferred via the conjunction 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.