 Interestingly, the involvement of knowledge gives raise to forms of ‘defeasible’ obligations that can disappear in the light of new information. For example, having being informed about her neighbor’s illness, the physician could have the obligation to administer a certain drug; however, this obligation would disappear if she were to learn that the neighbor is allergic to this medication. This ‘weaker’ form of obligation can also be captured within the setting discussed in Pacuit et al. (2006).