Which Face Is Real?

"On the internet, nobody knows you're a dog." So says the dog sitting at a computer in Peter Steiner's 1993 New Yorker cartoon. The cartoon captured a radical change in the nature of human interactions that was just beginning in 1993, a change both exhilarating for its possibilities, and terrifying for the same reason. Over the past quarter century, we've all learned the dog's lesson. A random stranger on the internet could be anybody, anywhere.