1 1Department of Philosophy, Philosophisches Seminar and Philosophy of Neuroscience Group, Centre for Integrative Neuroscience, University of Tübingen, Otfried-Müller-Str. 25, 72076 Tübingen, Germany.
2 2Centre for the Study of Perceptual Experience, University of Glasgow, 69 Oakfield Avenue, Glasgow, G12 8QQ UK.