Online research in philosophy

In Philosophy of Mental Representation five of the most original and important thinkers in philosophy of mind engage in an overlapping dialogue about mental representation. In new papers, contributors Andy Clark, Robert Cummins, Daniel Dennett, John Haugeland, and Brian Cantwell Smith each investigate the views and claims of one of the other contributors regarding mental representation. The subject then offers a reply. An exciting feature of this collection is the dynamic discussion among all contributors following each exchange. This collection offers the latest thinking on mental representation carefully and critically analyzed by the leading thinkers in the field.

The first part of this paper defends a 'two-factor' approach to mental representation by moving through various choice-points that map out the main peaks in the landscape of philosophical debate about representation. The choice-points considered are: (1) whether representations are conceptual or non-conceptual; (2) given that mental representation is conceptual, whether conscious perceptual representations are analog or digital; (3) given that the content of a representation is the concept it expresses, whether that content is individuated extensionally or intensionally; (4) whether intensional contents are individuated by external or internal conditions; and (5) given that conceptual content is determined externally, whether the possession conditions for concepts are external or internal. The final part of the paper examines the relationship between representation and consciousness, arguing that any account of mental representation, though necessary for a complete account of consciousness, cannot be sufficient for it.

The current orthodoxy on mental representation can be characterized in terms of three
central ideas. The first is ontological, the second semantic, and the third methodological. After
elucidating those, I argue that the emerging picture of mental representation is satisfactory only as
an account of mental representation at the sub-personal level. It is unsatisfactory, in a principled
way, as an account of mental representation at the personal level.

The relationship between mental representation and consciousness is considered. What it means to 'represent', and several types of representation (e.g., analogue, digital, spatial, linguistic, mathematical), are described. Concepts relevant to mental representation in general (e.g., multiple levels of processing, structure/process differences, mapping) and in specific domains (e.g., mental imagery, linguistic/propositional theories, production systems, connectionism, dynamics) are discussed. Similarities (e.g., using distinctions between different forms of representation to predict different forms of consciousness, parallels between digital architectures of the brain and connectionist models) and dissociations (e.g., insensitivity to gaps in subjective experience, explicit memory/implicit memory, automatic processing/controlled processing, blindsight, neglect, prediction/ explanation) of mental representation and consciousness are discussed. It is concluded that representational systems are separable from consciousness systems, and that mental representation appears necessary but not sufficient for consciousness. Considerations for future research on correspondences between representation and consciousness are suggested.