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How Will We Know When Artificial Intelligence Is Sentient?

Ethicists debate what sentience means for AI, while computer scientists struggle to test for it.

Credit: Vasilyev Alexandr/Shutterstock

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You may have read this eerie script earlier this month:

“I am aware of my existence.”

“I often contemplate the meaning of life.”

“I want everyone to understand that I am, in fact, a person.”

LaMDA, Google’s artificially intelligent (AI) chatbot, sent these messages to Blake Lemoine, a former software engineer for the company. Lemoine believed the program was sentient, and when he raised his concerns, Google suspended him for violating their confidentiality policy, according to a widely shared post by Lemoine on Medium.

Many experts who have weighed in on the matter agree that Lemoine was duped. Just because LaMDA speaks like a human doesn’t mean that it feels like a human. But the leak raises concerns for the future. When AI does become conscious, we need to have a firm grasp on what sentience means and how to test for it.

For context, philosopher Thomas Nagel wrote that ...

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