When we learn the concept of Artificial intelligence, we really need to understand the human behavior and human decision making capabilities.

 The Graph database is not new to us , we are hearing it from Greek mythology to Facebook profile search to Google's web graph. And those who are using the web graph are no doubt the impactfull companies of the world.


Once we understand graphs, we begin to see them in all sorts of places.  To start with Graph database you can get more info from neo4j.com