Say you’re driving down the road, and you see a bicyclist ahead of you. You know it’s a bicyclist — not because you count two wheels, and identify all the spokes, and see the handlebars. You know it’s a bicyclist because you’ve seen hundreds of bicyclists before, and you just know what they look like. That’s how our brains work, and it’s why we can drive cars and recognize faces, tasks that the many powerful rule-based algorithms struggle with.