Visual Information Processing and Phenomenal Consciousness

As far as an adequate understanding of phenomenal consciousness is concerned, representationalist theories of mind which are modelled on the information processing paradigm, are, as much as corresponding neurobiological or functionalist theories, confronted with a series of arguments based on inverted or absent qualia considerations. These considerations display the following pattern: assuming we had complete knowledge about the neural and functional states which subserve the occurrence of phenomenal consciousness, would it not still be conceivable that these neural states (or states with the same causal rôle or the same representational function) occur without having a phenomenal content at all, or that these states are accompanied by phenomenal contents differing widely from the usual ones.