Joanna had the fisherman's pie. 'What's under the mashed potato?' Slider asked. Joanna chewed thoughtfully for a moment and then looked down. 'Something white,' she said at last. 'With little bits of something pink.' She chewed again. 'I am eating, aren't I?' she appealed for reassurance. 'It's so hard to tell without some sensory input, like taste or texture.