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 -> u_3. p_2 -> u. u -> w. s -> p_2.
p_2 -> w can be inferred via the transitivity rule. u -> u_3 can be inferred via the transitivity rule. s -> u can be inferred via the transitivity rule.