Will Deep Learning replace all other forms of machine learning?

Beyond that, there are other important issues in machine learning besides representation learning, such as learning from delayed rewards, which is the focus of reinforcement learning, which deep learning per se does not address. Again, what we see here is combinations of deep learning with other types (e.g., Q-learning in DeepMind's Atari player). And backpropagation, which is what powers most deep learning systems, solves the credit assignment problem, but it doesn't solve other crucial problems, like learning structure, learning composable knowledge, generalizing out of sample, etc. So we need lots more besides deep learning to have a truly general-purpose learner.