 The question then is how to account for the fact that the sense of ownership (or its lack) is cognitively impenetrable. Participants in the rubber hand experiment are aware that the rubber hand is a fake hand and they rarely endorse the belief that the rubber hand is their own hand. Vice-versa: some patients know that their hand belongs to them, and yet it still seems to them as if it did not, as described by this patient: ‘my eyes and my feelings don’t agree, and I must believe my feelings. I know they look like mine, but I can feel they are not, and I can’t believe my eyes’ (Nielsen 1938: 555). Cognitive impenetrability is classically taken as the signature of experiential states. For instance, in the Müller-Lyer illusion one cannot help but experience the two lines as being different despite having the belief that they are actually of the same size. However, there are attitudes other than feelings and sensations that can be immune to the influence of beliefs (McDowell 2011). The question then is what kind of attitude: propositional imagination (Alsmith 2015), agreement towards a proposition (Wu forthcoming), perceptual seeming (Lyons 2011), or alief (Gendler 2008). Whatever attitude it may be, it will have to be not only cognitive impenetrable, but also beyond the subject’s control. Subjects cannot decide at will to experience the rubber hand illusion. In the case of disownership syndromes, it also seems that the attitude they are in should be affectively-loaded. Patients indeed are greatly distressed when they report that they do not feel their hand as their own.