By Greg Hackett
"How do you define the soul?"
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.