Evolving Robots Learn To Lie To Each Other
With the development of killer drones, it seems like everyone is worrying about killer robots. Now, as if that wasn't bad enough, we need to start worrying about lying, cheating robots as well.
In an experiment run at the Laboratory of Intelligent Systems in the Ecole Polytechnique Fédérale of Lausanne, Switzerland*, robots that were designed to cooperate in searching out a beneficial resource and avoiding a poisonous one learned to lie to each other in an attempt to hoard the resource. Picture a robo-Treasure of the Sierra Madre.
The experiment involved 1,000 robots divided into 10 different groups. Each robot had a sensor, a blue light, and its own 264-bit binary code "genome" that governed how it reacted to different stimuli. The first generation robots were programmed to turn the light on when they found the good resource, helping the other robots in the group find it.
The robots got higher marks for finding and sitting on the good resource, and negative points for hanging around the poisoned resource. The 200 highest-scoring genomes were then randomly "mated" and mutated to produce a new generation of programming. Within nine generations, the robots became excellent at finding the positive resource, and communicating with each other to direct other robots to the good resource.
However, there was a catch. A limited amount of access to the good resource meant that not every robot could benefit when it was found, and overcrowding could drive away the robot that originally found it.
After 500 generations, 60 percent of the robots had evolved to keep their light off when they found the good resource, hogging it all for themselves. Even more telling, a third of the robots evolved to actually look for the liars by developing an aversion to the light; the exact opposite of their original programming!
So far, the research has more application in explaining the evolution of behaviors in the natural world than in developing new programming for robots. But if you think that means I'm one step closer to trusting robots, then you're probably the sort who's attracted to the blue light.
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Nice piece. If a robot has learned to lie, has it become more human? Is this one more step toward creating our end, or creating ourselves, or both? It's not like people don't lie about resources...which is what makes the idea of a lying robot so uncanny.
From wikipedia on the uncally valley, "The uncanny valley hypothesis holds that when robots and other facsimiles of humans look and act almost like actual humans, it causes a response of revulsion among human observers. The "valley" in question is a dip in a proposed graph of the positivity of human reaction as a function of a robot's lifelikeness."
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