<p>Above all don't use the word good as though it meant something in evolutionary science.<br><br>Hilary, a young psychology researcher at a brain-science institute, is nursing a private sorrow and a troubling question at work, where psychology and biology meet. If there is nothing but matter, what is consciousness?<br><br>This is 'the hard problem' which puts Hilary at odds with her colleagues who include her first mentor Spike, h...