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 or u_1. p -> r_1. p_11 -> u_3. u_3 -> p_3. u_1 -> p_11. p_3 -> r_1.
p_11 -> p_3 can be inferred via the transitivity rule. u_3 -> r_1 can be inferred via the transitivity rule. u_1 -> u_3 can be inferred via the transitivity rule.