So basically the engineers knew something specific about the girl already which narrowed their data set. Unless they tell you what that was, we can go all day l

So basically the engineers knew something specific about the girl already which narrowed their data set. Unless they tell you what that was, we can go all day long guessing how they "figured" it out. In fact with this information I am interested in the actual time taken to find the girl. They could have found her in five minutes after receiving the picture and you wouldn't know. Why? From the article: 1) They were running software on a computer for hours They are engineers! 2) The first couple of tries didn’t work Are you sure they weren't debugging? 3) They knew what high school she went too prior to searching If they know the high school they only have to find one or two established teachers who were around for a long period of time. It is not unlikely they can call a name from a picture after all those years. This smells like viral marketing to me (too bad I still don't know what close.io is, should have added some information to the article. Or are you looking for new engineers? "Hey look! At close.io we seal bets with engineers. About girls! Come work for us!").