Recently artificial intelligence is hot.
A British theoretical physicist Stephen Hawking,
he said, "When you develop a complete artificial intelligence, it might mean the end of humanity."
When compared to computers and the human, we cannot win them in the amount of knowledge, but about abstract thinking, in terms of understanding of concepts,
so far we have not thought that machines can still do that.
However, about extraction of concepts,
it seems to be realized by the algorithm of deep learning
(methods of hierarchically understanding things).
This must be an interesting technology as one of methods.