 To get the flavor of Milner and Goodale’s hypothesis, consider just one strand from the wealth of evidence that they provide. This is a neurological syndrome called visual form agnosia, which results from damage localized to both temporal lobes, leaving primary visual cortex and the parietal lobes intact. (Visual form agnosia is normally caused by carbon monoxide poisoning, for reasons that are little understood.) Such patients cannot recognize objects or shapes, and may be capable of little conscious visual experience; but their sensorimotor abilities remain largely intact.