Online research in philosophy

In this essay I take issue with Derek Parfit's reductionist account of personal identity.Parfit is concerned to respond to what he sees as flaws in the conception of the role of 'person' in self-interest theories. He attempts to show that the notion of a person as something over and above a totality of mental and physical states and events (in his words, a 'further fact'), is empty, and so, our ethical concerns must be based on something other than this. My objections centre around the claim that Parfit employs an impoverished conception of 'life'. Parfit misconceives the connection between 'I' and one's body, and, so, despite his rejection of a metaphysical conception of 'self', remains within the logic of Cartesianism. What Parfit and other reductionists call an 'impersonal' perspective, I shall call the third-person perspective: a perspective which one in general may take. Against Parfit I shall offer a more complex conception of 'self' through the concept of 'bodily perspective'. I emphasize the irreducible ambiguities of human embodiment in order to show the presuppositions and the limitations of Parfit's view. Of interest is the conception of time and the model of continuity that is appropriate to an embodied subject's life. I employ Paul Ricoeur's concept of 'human time' to argue that the reflective character of human experience demands a model of temporality and continuity that differs significantly from the one Parfit employs.

This paper has been about the question of what there is most reason to doin situations in which either there are no moral considerations to be takeninto account or the moral considerations to be taken into account are equally balanced. I have assessed all Parfit's arguments for concluding that the Present-aim Theory is right and the Self-interest Theory wrong aboutthis question. In § III, I showed how Parfit's argument from personal identity leads not to the abandonment of the Self-interest Theory, but merely to a revision of it. In § IV, I argued that a premiss relied on by Parfit's argument from incomplete relativity - the premiss that theoretical and practical reason are relevantly similar - is too weak to support the conclusion that knowingly doing what is against one's long- term self-interest is rational (when no moral considerations are in play). In § V, I addressed Parfit's argument that we must reject the Self-interest Theory because we believe that it is rational to care more about certain things (such as achievement) than about one's overall welfare. I suggested that he misdescribed what we believe: for what we really believe is that it is not irrational to care more about these things than about either having the most pleasant life possible or having the life with the strongest desires fulfilled. This thought is consistent with Objective List versions of the Self- interest Theory. In § VI, I suggested Parfit's argument from our bias towards the future might be answered by making a second revision to the Self-interest Theory. Therefore, for all Parfit has argued, a version of the Self-interest Theory might be the most plausible theory of what we have most reason to do when moral considerations do not decide the issue.21.

In this paper, I compare John Locke’s “memory theory” of personal identity and Memento (directed by Christopher Nolan). I argue that the plot of Memento is ambiguous, in that the main character (Leonard Shelby, played by Guy Pearce) seems to have two histories. As such, Memento is but a series of puzzle cases that intend to illustrate that, although our memories may not be chronologically related to one another, and may even be fused with the memories of other persons, those memories still constitute personal identity. Just as Derek Parfit argues, perhaps there is no personal identity as such, since only survival (in some degree) matters to us. In Memento, Leonard Shelby is not identity to his former self, but survives to some extent.

In this paper I shall argue that if the Parfitian psychological criterion or theory of personal identity is true, then a good case can be made out to show that the psychological theorist should accept the view I call “psychological sequentialism”. This is the view that a causal connection is not necessary for what matters in survival, as long as certain other conditions are met. I argue this by way of Parfit’s own principle that what matters in survival cannot depend upon a trivial fact.

This paper's ?I examines Derek Parfit's main, metaphysical, argument for reductionism about personal identity. ?II considers three possible ethical arguments for reductionism, and suggests a new approach to the question of what matters about personal identity which has to do with the notion of an ethical narrative.

In his Reasons and Persons, Derek Parfit argues from the possibility of cases of fission and/or fusion of persons that one must reject identity as what matters for personal survival. Instead Parfit concludes that what matters is “psychological connectedness and/or continuity with the right kind of cause,” or what he calls an R-relation. In this paper, I argue that, if one accepts Parfit’s conclusion, one must accept that R-relations are what matter for moral responsibility as well. Unfortunately, it seems that accepting that the R-relation is what matters for both survival and moral responsibility leads to a contradiction. My goal, however, is not merely to point out a problem in Parfit’s account. Instead, I believe that once we understand the basic intuitions which lead to this contradiction, it is clear that there is no fully satisfactory way to account for what matters with respect to survival and moral responsibility.

Self-interest is widely regarded as an important, if not as the only, source of reasons for action, and hence it is widely held that one can rationally give special weight to one’s self-interest in deciding how to act. In what follows, I will argue against this view. I will do so by following the lead of Derek Parfit, and considering cases in which personal identity appears to break down. My argument will differ from Parfit’s, however, in that it will have a stronger conclusion, it will involve fewer assumptions, and it will be compatible with a wider range of theories of personal identity.

Abstract In Reasons and Persons, Derek Parfit argues that personal identity is indeterminate and that identity is not what matters in personal survival. Parfit argues that traditional views of personal identity have counterintuitive consequences and that they violate a plausible requirement, suggested by Bernard Williams, that must be met by any acceptable criterion of identity. Parfit argues that, unlike traditional determinate views of personal identity, his view succeeds in accommodating intuitions and in meeting (an analogue to) Williams' requirement. I argue that Parfit's view has more counterintuitive consequences than do the traditional views of identity. Though the traditional views do seem to violate Williams' requirement, Parfit's view fares no better. In fact, it seems that any theory of personal survival that appeals to connections that may hold to a greater or lesser extent will fail to meet the relevant requirement. This is an important general point, since the requirement is a plausible one.

Parfit's most controversial claim about personal identity is that personal identity does not matter in the way we uncritically think it does) I would like to analyze Parfit's reasons for making this claim. These reasons are complex, and they stand in some tension with one another. I would like to examine them carefully and to try to arrive at the strongest case that can be made for Parfit's controversial claim about what matters.