 In recent years there have been attempts to extend the scope of the category of the supererogatory to non-moral normative domains. Some discuss the idea of epistemic supererogation, the idea that in one’s search for knowledge one goes beyond some reasonable measure of epistemic responsibility by being more diligent or looking for more evidence than is usually required in such search (Hedberg 2014). All that is needed for such an extension of the applicability of the supererogatory is a normative domain which has a scale of value on the one hand (e.g. degrees of epistemic responsibility) and standards of expected time and energy involved in the search of the relevant value (e.g. knowledge). Similarly one may also speak of supererogation in the context of prudence, when one does more than can be expected of a normal level of care and self-control in sticking to a medically desirable diet (McElwee 2017). Even in business ethics the category of supererogation is used to describe behavior of firms which not only go beyond legal and economic norms but also beyond corporate social responsibility and "positive deviance" (such as philanthropic activities). One example is Johnson&amp;Johnson’s decision to the recall of Tylenol after the 1982 poisoning affair, in which legal counsels, consumers and even the media did not consider it as morally necessary. This was an unprecedented decision which meant a huge financial sacrifice on part of the firm. Finally, supererogation is also applied in the sphere of professional ethics, such as the behavior of doctors. As against Rawls and Heyd, it is argued that supererogatory behavior is not confined to the domain of natural duties but may hold also in cases of surpassing professional duties. For example, a nurse who brings books from home to a patient in her ward is acting beyond her professional duty but she is still acting as a nurse and in that sense her act is "continuous" with her professional duties. The good promoted beyond the normal professional standard is "profession specific" (Eriksen 2015).