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_11 -> w. u_4 -> w. t -> q_6. q_6 -> u_4. t.
q_6 can be inferred via the modus ponens rule. t -> u_4 can be inferred via the transitivity rule. q_6 -> w can be inferred via the transitivity rule.