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 -> u_1. p_14 -> q. p_14 <-> p. u_1 -> p.
q -> p can be inferred via the transitivity rule. p_14 -> u_1 can be inferred via the transitivity rule. p_14 -> p can be inferred via the biconditional elimination rule. p -> p_14 can be inferred via the biconditional elimination rule.