Anyone who had raised a child would tell you that, a human, requires years of training to learn the difference between a dog and a cat, by looking countless examples.

Of course, the disparity between deep neural nets and human brains remains unknown. A human learns the difference between a cat and a dog, while at the same time, learns so many different things, yet a neural net only learns the difference between a cat and a dog. We don't know how much we don't know.