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So google built a brain with around 16 thousand processors and it was similarly modeled to the human brain, though of course much larger. Now this is a scary thought to most people, because it can learn, understand concepts and whatnot. What google did with it is they fed it 10 million thumb nails from youtube videos. Now what happened next is interesting.
It knows what cats are.
After deciphering 10 million youtube thumbnails, it discovered cats. Now google didnt say: "hey computer, this is a cat! Go find them!". The A.I. basically taught its self the concept of cats. This isnt surprising because we all know the internet is a series of tubes, and those tubes are filled with cats.