The problem of unreportable awareness

We tend to regard consciousness as a fundamentally subjective phenomenon, yet we can only study it scientifically if it has objective, publicly visible, manifestations. This creates a central, recurring, tension in consciousness science which remains unresolved. On one 'objectivist' view, consciousness is not merely revealed but endowed by the process of reporting which makes it publicly accessible. On a contrasting 'subjectivist' view, consciousness, per se, is independent of the possibility of report, and indeed will always remain beyond the reach of direct observation. I shall explore this tension with examples drawn from clinical neurology, cognitive neuroscience and philosophy. The underlying aim of the paper is to open up the simple but profoundly difficult question that lurks in the background of consciousness science: what is it that are studying?