 Finally, a slightly different (but related) challenge to the four-abilities model is made using the notion of authenticity. Building on the idea introduced by Tan, Stewart, Fitzpatrick, and Hope (2006a) that certain values are caused by mental disorder and suspect in virtue of this, these critics raise the worry that the values driving decisions may not be authentic values of the patient. If authenticity is, in turn, thought of as part of autonomy, then it might be thought that inauthentic values undermine capacity (though see discussion of autonomy and capacity  §2).  So the question then becomes: can we require that the values driving a treatment decision be authentic, and if not may we declare the person incompetent?