Neuroscience has made great progress in uncovering the mechanisms in the brain that underlie our cognitive and behavioural functioning. But this form of scientific investigation has not produced anything approaching a satisfying explanation of why it is that a person has subjective experience, i.e., of why there is something that it’s like to be a human being. It seems that we can imagine a creature that was empirically indiscernible from a human being in terms of its physical brain processes and the behaviour they give rise to, but which had no experience whatsoever (it screams and runs away when you stick a knife in it, but it doesn’t actually feel pain). And it arguably follows that facts about physical brain processes and behaviour cannot explain, at least not in a transparent and satisfying manner, the reality of conscious experience.