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. w <-> q_6. p_4 or q_6. ~p_4 or q.
q_6 or q can be inferred via the resolution rule. w -> q_6 can be inferred via the biconditional elimination rule. q_6 -> w can be inferred via the biconditional elimination rule. ~q_6 can be inferred via the biconditional elimination rule.