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_4 -> t. q -> t. q. t -> q_8. q_8 -> q.
t can be inferred via the modus ponens rule. w_4 -> q_8 can be inferred via the transitivity rule. q -> q_8 can be inferred via the transitivity rule. t -> q can be inferred via the transitivity rule. q_8 -> t can be inferred via the transitivity rule.