It's a bit more precise than that because of the examples given, but also the interesting bit is that it does it with only general guidance from the programmer,

It's a bit more precise than that because of the examples given, but also the interesting bit is that it does it with only general guidance from the programmer, on a set of x which is not previously known. Up to now algorithms have encoded domain knowledge, but that's about to change if deep learning lives up to its promise.