A current limitation of AI is that it needs to be fed a lot of information to learn. Machines need to see millions of pictures, paintings, and illustrations of an elephant to "understand" what it is. Humans, by contrast, can see just a single elephant, and then recognize a drawing or abstraction of it as an elephant (provided they already have developed nuanced enough schema to recognize it as a species unique from other, similar animals). Should AI develop the ability to extrapolate from limited sets of information, that would be a higher level of AI. And should AI ever reach the ability to evolve on its own, to adjust its own programming (software) and physical makeup (hardware), that might be the highest level of AI. *