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: w -> q_2. q <-> q_8. q_2 -> q.
w -> q can be inferred via the transitivity rule. q -> q_8 can be inferred via the biconditional elimination rule. q_8 -> q can be inferred via the biconditional elimination rule.