DECEITFUL BEHAVIOR. “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!”
http://www.popsci.com/scitech/article/2009-08/evolving-robots-learn-lie-hide-resources-each-other