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_12 -> s_4. p_12 or q_1. p <-> q_1. ~p. s_4 -> q_4.
p_12 -> q_4 can be inferred via the transitivity rule. ~q_1 -> p_12 can be inferred via the rewriting rule. p -> q_1 can be inferred via the biconditional elimination rule. q_1 -> p can be inferred via the biconditional elimination rule. ~q_1 can be inferred via the biconditional elimination rule.