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_14 or ~q_4. s_1 -> q_4. p_14 <-> s_1.
q_4 -> p_14 can be inferred via the rewriting rule. p_14 -> s_1 can be inferred via the biconditional elimination rule. s_1 -> p_14 can be inferred via the biconditional elimination rule.