Considering various arguments in Hume’s Treatise, I reconstruct a Humean argument against personal identity or unity. According to this argument, each distinct perception is separable from the bundle of perceptions to which it belongs and is thus transferable either to the external, material reality or to another psychical reality, another bundle of perceptions. Nevertheless, such transference (Hume’s word!) is entirely illegitimate, otherwise Hume’s argument against causal inference would have failed; furthermore, it violates private, psychical accessibility. I suggest a Humean thought (...) experiment clearly demonstrating that, to the extent that anything within a psychical reality is concerned, no distinction leads to separation or transference and that private, psychical accessibility has to be allowed in the Humean argument for personal identity or unity. Private accessibility and psychical untransferability secure personal identity and unity. Referring to the phenomenon of multiple personality along the lines of the Humean argument for personal identity or unity, I illustrate both private accessibility and a possible notion of one and the same person distinct from his/her alters or psychical parts. Finally, I show why Parfit’s Humean argument against personal identity must fail. (shrink)

Philosophers often talk as if what it takes for a person to persist through time were up to us, as individuals or as a linguistic community, to decide. In most ordinary situations it might be fully determinate whether someone has survived or perished: barring some unforeseen catastrophe, it is clear enough that you will still exist ten minutes from now, for example. But there is no shortage of actual and imaginary situations where it is not so clear whether one survives. (...) Here reasonable people may disagree. There are "fission" cases where each of one's cerebral hemispheres is transplanted into a different head; Star-Trek-style "teletransportation" stories; actual cases of brain damage so severe that one can never again regain consciousness, even though one's circulation, breathing, digestion, and other "animal" functions continue; and stories where one's brain cells are gradually removed and replaced by cells from someone else, to name only a few favorites. (shrink)

If personal identity consists in non-branching psychological continuity, then the sharp breaks in psychological connectedness characteristic of Multiple Personality Disorder implicitly commit psychological continuity theories to a metaphysically extravagant reification of alters. Animalist theories of personal identity avoid the reification of alternate personalities by interpreting multiple personality as a failure to integrate alternative autobiographical memory schemata. In the normal case, autobiographical memory cross-classifies a human life, and in so doing provides access to a variety of interpretative frameworks with their associated (...) clusters of general event memory and episodic memory. Multiples exhibit erratic behavior because they cannot access reliably the intersecting autobiographical memory schemata that permit graceful transitions between social roles, behavioral repertoire and emotional dispositions. Selves, in both normal and certain pathological cases, are best understood as semi-fictional narratives created by human animals to serve their social, emotional and physical needs. (shrink)

In this paper, I want to discuss the relation between ambivalence and the unity of the self. I will raise the question whether a person can be both ambivalent about his own will and nevertheless be wholehearted. Since Harry Frankfurt’s theory is my main point of reference, I briefly introduce his account of the will and the reasons for his opposition towards ambivalence in the first section. In the second section, I analyse different interpretations of ambivalence. In the third section, (...) I provide a narrative account of a diachronic integration of the self that allows for the integration of volitional ambivalence. Finally, I scrutinise different meanings of the unity of the self, since disintegration, not ambivalence, seems to be bad for us. I conclude that persons can indeed be wholeheartedly ambivalent. (shrink)

Simon Evnine examines various epistemic aspects of what it is to be a person. Persons are defined as finite beings that have beliefs, including second-order beliefs about their own and others' beliefs, and are agents, capable of making long-term plans. It is argued that for any being meeting these conditions, a number of epistemic consequences obtain. First, all such beings must have certain logical concepts and be able to use them in certain ways. Secondly, there are at least two principles (...) governing belief that it is rational for persons to satisfy and are such that nothing can be a person at all unless it satisfies them to a large extent. These principles are that one believe the conjunction of one's beliefs and that one treat one's future beliefs as, by and large, better than one's current beliefs. Thirdly, persons both occupy epistemic points of view on the world and show up within those views. This makes it impossible for them to be completely objective about their own beliefs. Ideals of rationality that require such objectivity, while not necessarily wrong, are intrinsically problematic for persons. This "aspectual dualism" is characteristic of treatments of persons in the Kantian tradition. In sum, these epistemic consequences support a traditional view of the nature of persons, one in opposition to much recent theorizing. (shrink)

Dissociative Identity Disorder (DID) (formerly known as Multiple Personality Disorder) is a condition in which a person appears to possess more than one personality, and sometimes very many. Some recent criminal cases involving defendants with DID have resulted in "not guilty" verdicts, though the defense is not always successful in this regard. Walter Sinnott-Armstrong and Stephen Behnke have argued that we should excuse DID sufferers from responsibility, only if at the time of the act the person was insane (typically delusional); (...) otherwise the presumption should be that persons with DID are indeed responsible for their actions. We find their interpretation of DID and of the way in which the requirements for criminal insanity relate to this condition worrying and likely to result in injustice to DID sufferers. Our thesis is that persons with DID cannot be responsible for their actions if the usual features of the condition are present. A person with DID is a single person in the grip of a very serious mental disorder. By focusing on the features of DID which have, as we argue, the effect of deluding the patient, we try to show that such a person is unable to fulfill the ordinary conditions of responsible agency (namely, autonomy and self-control). (shrink)

This paper outlines a multidimensional conception of Multiple Personality Disorder (MPD) that differs from the 'orthodox' conception in terms of the content of its commitment to the reality of the self. Unlike the orthodox conception it recognizes that selves are fuzzy entities. By appreciating the possibility that selves are fuzzy entities, it is possible to rebut a form of fictionalism about the self which appeals to clinical data from MPD. Realism about self can be preserved in the face of multiple (...) personalities. (shrink)

The condition known as Multiple Personality Disorder (MPD) or Dissociative Identity Disorder (DID) is metaphysically strange. Can there really be several distinct persons operating in a single body? Our view is that DID sufferers are single persons with a severe mental disorder. In this paper we compare the phenomenology of dissociation between personality states in DID with certain delusional disorders. We argue both that the burden of proof must lie with those who defend the metaphysically extravagant Multiple Persons view and (...) that there is little theoretical motivation to yield to that view in light of the fact that the core symptoms of DID bear remarkable similarity to the symptoms of these other disorders where no such extravagance is ever seriously entertained. (shrink)