The question (src: http://i.imgur.com/CwegI9i.png http://i.imgur.com/CwegI9i.png ) is a Prolog problem, which is just a bunch of logical premises that the syste

The question (src: http://i.imgur.com/CwegI9i.png http://i.imgur.com/CwegI9i.png ) is a Prolog problem, which is just a bunch of logical premises that the system is supposed to find the conclusion for (kinda like A=>B, B=>C, therefore A=>C). The problem doesn't involve analyzing communications or predicting anything, and it would have little or no use when developing social network systems.