Since the left nostril has little or no direct sensory input to the right hemisphere, and since it is the right hemisphere that is damaged, one might assume – wrongly – that left-sided olfaction would be spared. But that is, precisely, to misunderstand the nature of the problem: to see the problem as at a purely sensory level. The problem arises at the level of the whole world coming into being – or, as in this case, not coming into being.26
