As the causal connection between the worker`s personal appearance and the number of customers attracted depends on a case of external nonrelevance, the employer may, according to the universal version of the relevance principle, not require `er employees to change their appearance just to make sure that no (biased) customer will be repelled by this appearance. This conclusion holds when the argument is taken at face value. However, if the very existence or continuation of the firm or job itself is at stake, the worker`s appearance does matter in a different way. Under this condition, the company at issue would have to keep or hire a person for a job which would be lost if `e were indeed kept there or hired for this job. Not being able, then, to do `er work well in the strict sense (because not at all) in the near future, even the worker `imself could recognize this as a reason not to keep or employ `im. The relevant factor is, then, not personal appearance, but the quality of work to be done and remaining to be done in the strict sense.