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: p_4 -> u. u -> w. w -> p_4. t -> u.
p_4 -> w can be inferred via the transitivity rule. u -> p_4 can be inferred via the transitivity rule. w -> u can be inferred via the transitivity rule. t -> w can be inferred via the transitivity rule.