  Chalmers (1996) in the course of his exhaustive study of consciousness developed a theory of non-physical qualia which to some extent avoids the worry about nomological danglers. The worry expressed by Smart (1959) is that if there were non-physical qualia there would, most implausibly, have to be laws relating neurophysiological processes to apparently simple properties, and the correlation laws would have to be fundamental, mere danglers from the nomological net (as Feigl called it) of science. Chalmers counters this by supposing that the qualia are not simple but unknown to us, are made up of simple proto-qualia, and that the fundamental laws relating these to physical entities relate them to fundamental physical entities. His view comes to a rather interesting panpsychism. On the other hand if the topic neutral account is correct, then qualia are no more than points in a multidimensional similarity space, and the overwhelming plausibility will fall on the side of the identity theorist.