The devil is in the details

Artificial intelligence, machine learning, and deep learning all seem like fairly similar concepts. More to the point, they seem the same to an untrained eye. A lot of humans see them as the same concept because, in part, they kind of are. Just as nuclear or theoretical physics are parts of physics as a whole, machine learning, and deep learning are the branches of a colossal tree that is artificial intelligence. Think of them like Russian nesting dolls, each being a part of something bigger.