The principle of isomorphism is either true physiologically, or it is not. If it is true, i.e. if the neurophysiological representation is in every way similar to the subjective percept corresponding to it, then it follows that any model that is not isomorphic with the subjective percept, is not an accurate model of the neurophysiological mechanism of perception. It is therefore necessary (and not simply useful) for a model of perception to be isomorphic if it is to accurately reflect the information encoded in perception. A model of vision that is not isomorphic with the subjective experience of perception is a model that claims that perception is a phenomenon without neurophysiological counterpart, which the reviewer himself agrees is absurd.