You'd run a program in the background that monitors your Facebook changes and all of your email conversations. Together with your photos, your resume, and all of your shopping and entertainment preferences, the program running in the cloud could piece together an avatar of you. ... Artificial intelligence will get to the point where all you need to do is seed it with an individual's personality and it will do the rest. People of the future will be able to have extended conversations with loved ones who have passed. The generation who personally knew the departed might detect slight flaws in the personality of the digital copy, but to the third generation, great granddad's ghost would appear as real as anyone they know.