Facebook has shut down a pair of artificial intelligence robots after they invented their own language.

Earlier this year, the research team at Facebook Artificial Intelligence Research built a ?chatbot? that was supposed to learn how to negotiate by observing and imitating human trading and bartering practices.

But when the researchers pit two of the AI programs, nicknamed Alice and Bob, against each other to trade, the bots began to engage in their own form of communication. The researchers tasked the robots with trading hats, balls and books, by determining the value of each object and bartering them with each other.

However, since Facebook?s researchers provided no incentive for trading in English, the programs immediately created their own terms for cutting deals.

After shutting down the robot conversation, Facebook said the AI project marked important progress toward ?creating chatbots that can reason, converse, and negotiate, all key steps in building a personalized digital assistant.?

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