I was looking through my contacts the other day, deleting some people I don't speak to any more. Its interesting that with 5 or so unique enough contacts I coul

I was looking through my contacts the other day, deleting some people I don't speak to any more. Its interesting that with 5 or so unique enough contacts I could be identified. If they were sufficiently unique, no one in the world could possible know those 5 people. Scary thought.