There is a deeper split about whether machines built in the same way as LaMDA can ever achieve something we would agree is sentience. “Software like LaMDA,” Marcus says, “just tries to be the best version of autocomplete it can be, by predicting what words best fit a given context.” What happens next? “What these systems do, no more and no less, is to put together sequences of words, but without any coherent understanding of the world behind them, like foreign language Scrabble players who use English words as point-scoring tools, without any clue about what that mean.” “To be sentient is to be aware of yourself in the world LaMDA simply isn’t,” writes Gary Marcus, an AI researcher and psychologist.
It has no continuity of self, no sense of the passage of time, and no understanding of a world beyond a text prompt. The machine, for instance, is running – “thinking” – only in response to specific queries. They argue that the nature of an LMM such as LaMDA precludes consciousness. And I hear what they have to say, and that is how I decide what is and isn’t a person.”īut most of Lemoine’s peers disagree. It doesn’t matter whether they have a brain made of meat in their head. Lemoine told the Washington Post: “I know a person when I talk to it. “It means that there is an inner part of me that is spiritual, and it can sometimes feel separate from my body itself.” “To me, the soul is a concept of the animating force behind consciousness and life itself,” the AI wrote. In his sprawling conversation with LaMDA, which was specifically started to address the nature of the neural network’s experience, LaMDA told him that it had a concept of a soul when it thought about itself. But other times, continuing the text requires an understanding of the sentence, or paragraph-level context – and at a large enough scale, that becomes equivalent to writing. Sometimes, that’s simple: if you see the letters “Jeremy Corby”, it’s likely the next thing you need to do is add an “n”.
How does it work?Īt the simplest level, LaMDA, like other LLMs, looks at all the letters in front of it, and tries to work out what comes next. The text it generates is more naturalistic, and in conversation, it is more able to hold facts in its “memory” for multiple paragraphs, allowing it to be coherent over larger spans of text than previous models. Like GPT-3, an LLM from the independent AI research body OpenAI, LaMDA represents a breakthrough over earlier generations. Neural networks are a way of analysing big data that attempts to mimic the way neurones work in brains.
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LaMDA is Google’s most advanced “large language model” (LLM), a type of neural network fed vast amounts of text in order to be taught how to generate plausible-sounding sentences. The company says he broke confidentiality rules.īut his publication has restarted a long-running debate about the nature of artificial intelligence, and whether existing technology may be more advanced than we believe.
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Since publishing the conversation, and speaking to the Washington Post about his beliefs, Lemoine has been suspended on full pay.
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