Vehicle and content: a philosophical investigation of a deep problem in cognitive science.

One of the most crucial issues in cognitive science and the philosophical discussion within it concerns the relations between 'vehicles' and 'contents' -the relation between the content of perceptual and cognitive processes and the 'carriers' of these contents that are internal to individual perceivers or cognizers. The philosophical discussion concerns whether one has to postulate apriori that there should be an isomorpbism between vehicle and content. At the empirical level one sees numerous models being proposed where isomorphism is not complied with.