Wanda is annoyed because her waiter keeps getting her order wrong and doesn't seem to be listening to her. wanda informs her companions she will not be leaving a tip for such a lazy, incompetent waiter. unbeknownst to wanda, two other wait persons have called in sick, leaving her waiter with twice the workload. by not considering external forces to explain the waiter's behavior, what type of error is wanda making?