Online research in philosophy

Philosophers have developed various systems of individuation for handling questions of identity regarding works of art. But even a casual survey of different arts reveals that questions of individuation in one art form are markedly different from questions of individuation in another. Though distinctively philosophical concepts can go a short way in clarifying these issues, it is hardly likely that any single philosophical system can do justice to them all.

We will define three kinds of identity: the Bourbaki identity, the logical identity and the diagonal identity (in short B-, l-, d-identity respectively) and study the connections between them. A whole picture of these relations is given at the end of the paper.

I argue that there are good reasons to deny both type-type and token-token mind-brain identity theories. Yet on the other hand there are compelling reasons for thinking that there is a causal basis for the mind. I argue that a path out of this impasse involves not only showing that criteria of individuation do not determine identity, but also that there are sound methodological reasons for thinking that the cause of intelligent behavior is a real natural kind. Finally, a commitment to this methodology suggests both that these familiar anti-reductionist arguments fail to establish that identity is impossible and at the same time suggest that the preferred alternative will be some version of neutral monism.

In this book, which thoroughly revises and greatly expands his classic work Sameness and Substance (1980), David Wiggins retrieves and refurbishes in the light of twentieth-century logic and logical theory certain conceptions of identity, of substance and of persistence through change that philosophy inherits from its past. In this new version, he vindicates the absoluteness, necessity, determinateness and all or nothing character of identity against rival conceptions. He defends a form of essentialism that he calls individuative essentialism, and then a form of realism that he calls conceptualist realism. In a final chapter he advocates a human being-based conception of the identity and individuation of persons, arguing that any satisfactory account of personal memory must make reference to the life of the rememberer himself. This important book will appeal to a wide range of readers in metaphysics, philosophical logic, and analytic philosophy.

It has long been debated whether objects are ‘sortally’ individuated. This paper begins by clarifying some of the key terms in play—in particular, ‘sortal’, ‘individuation’, and ‘object’. The term ‘individuation’ is taken to have both a cognitive and a metaphysical sense, in the former denoting the singling out of an object in thought and in the latter a determination relation between entities. ‘Sortalism’ is defined as the doctrine that only as falling under some specific sortal concept can an object be successfully singled out in thought. It is argued that such a view is too strong, but that a weaker one, ‘categorialism’, can be defended, this implying that a thinker cannot successfully single out an object in thought without having at least an implicit grasp of the criterion of identity that the object satisfies.

Introduction -- Am I alone in my body? -- Multiple personality -- Personal identity -- Diachronic identity -- What am I fundamentally? -- Empirical discernability and fission -- My body -- The various senses of personal identity -- Multiple personality and individuation -- Morton Prince's seminal case study the dissociation of a personality -- Philosophical theories of multiple personality -- The coexistence thesis -- Sharing my body -- A criterion of individuation -- Multiple personality in therapeutic and biographic discourses -- Multiple personality in literary discourses.