Hiroshi Ishiguro has faced the challenges of creating robots capable of recognizing the subtleties in human expressions and emotions. His latest humanoid Erica – dubbed by her creator as the ‘most beautiful and intelligent’ android ever – is 23 and is able to engage in 10-minute conversations with people. Ishiguro considers that desire and intention are key prerequisites to achieving human AI. By 2020, he and his team hope to apply those successfully in Erica.