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In 2020,OpenAI,a research lab in San Francisco,revealed a system called GPT-3.It iswhat artificial intelligence researchers call a neural network,after the web of neurons in thehuman brain.A neural network is really a mathematical system that leams skills by locatingpattems in vast amounts of digital data.By analyzing thousands of cat photos,for instance,itcan leam to recognize a cat.We call it arificial intelligence,"but a better name might be‘finding statistical patterns from large data sets',"said Dr.Gopnik,the Berkeley professor.More recently,researchers at places like Google and OpenAI began building neuralnetworks that leamed from enormous amounts of prose,including digital books and Wikipedia

articles by the thousands.GPT-3 is an example.As it analyzed all that digital text,it built whatyou might call a mathematical map of human language —more than 175 billion data points thatdescnbe how we piece words together.Using this map,it can perform many different tasks,likepenning speeches,writing computer programs and having a conversation.

But there are limitations.If you ask GPT-3 for 10 speeches in the voice of Mark Twain,itmight give you five that sound remarkably like the famous writer —and five others that comenowhere close.Computer programmers use the technology to create small snippets(一小段)ofcode they can slip into larger programs,but more often than not they have to edit and adjustwhatever it gives them.

Still,Dr.Gopnik described this kind of system as intelligent.“It is not intelligent in the wayhumans are.It is like an unfamiliar form of intelligence,"he said.“But it still counts.”

Dr.Gopnik and many others in the field are confident that they are on a path to building amachine that can do anything the human brain can do.This confidence shines through whenthey discuss current technologies.He admits that some A.I.researchers “struggle to differentiatebetween reality and science fiction."But he believes these researchers still serve a valuable role.“They help us dream of the full range of the possible,”he said.

Perhaps they do.But for the rest of us,these dreams can get in the way of the issues thatdeserve our attention

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