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 <-> q_10. p_15 <-> w. t_4 -> q_10. t_4 or ~q_10. ~p_15.
q_10 -> t_4 can be inferred via the rewriting rule. w -> q_10 can be inferred via the biconditional elimination rule. p_15 -> w can be inferred via the biconditional elimination rule. q_10 -> w can be inferred via the biconditional elimination rule. w -> p_15 can be inferred via the biconditional elimination rule. ~w can be inferred via the biconditional elimination rule.