We all love them. They’re everywhere. Whenever and wherever they pop up, we feel the anticipation and excitement, just knowing that we’re about to identify tractors or traffic lights or buses. We feel a sense of achievement, having helped AI to better itself, and one day, just maybe, as we ride along in a fully autonomous, self-driving vehicle, we can marvel at the idea that we had a small part to play in teaching the AI to avoid all those pesky tractors and buses.