I really like the example image in this article. The image asks the computer if there is a cat or a dog in the picture. As humans we can question the question being asked and reply with there is both a cat and a dog. 

Computers rarely process problems in that way. It is difficult for them to realise they can answer the question in such a way without them being told the answer can be neither, a cat, a dog or both. 

If Google can make a break through in this kind of AI it will greatly advance the way that computers are used in daily life.