For some reason, we often think of computers as infallible -- subjective, logical, rational, and nearly always right. There is something about a computer's lack of emotion and intelligence that makes them strangely trustworthy -- while, on the other hand, despite their massive intelligence, we all know that humans are deeply flawed and prone to all sorts of biases. As it turns out, computers are deeply flawed as well: Optical illusions can work on computers, too.