“Over just seven years, the games-maker Lumosity rocketed from zero to 50 million users, promising rapid improvements in general intelligence by playing brain-training video games for just a few weeks. (Lumosity recently settled with the United States Federal Trade Commission for making unsupported claims that its product was scientifically validated.) … So, does all this mean that there is no hope for cognitive enhancement? My view is that there is actually lots of hope, as long as we are not unrealistic about what we can achieve.”