  Koch approvingly cites Sacks’ suggestion that cinematographic vision – a form of akinetopsia – reveals the ‘nature of visual experience when the illusion of motion has been lost’. However, this speculation is puzzling for two reasons. The first is trivial: the designation ‘cinematographic’ is less than ideal and potentially misleading: as we have already seen (in §4.1), a plausible case can be made for holding that in a properly run cinema, the stills projected onto the screen are not themselves seen as such – all we see are the intended moving images. Second and more importantly, given the world of difference between Sacks’ motion-free experience and our everyday visual experience, in what sense can the motion we apprehend in the latter reasonably be construed as illusory? The realist will insist that if motion is an intrinsic feature of sensory experience – and it seems to be – doesn’t that suffice to ensure that it is a real feature of it too?