Science Magazine – August 25, 2023: This image depicts whole chromosomes, some with structural abnormalities that might be found in cancer. The idea that cancer cells have aneuploidy—abnormal numbers of chromosomes and chromosome portions—has been known for decades. 

If AI becomes conscious, how will we know?

Scientists and philosophers are proposing a checklist based on theories of human consciousness

In 2021, Google engineer Blake Lemoine made headlines—and got himself fired—when he claimed that LaMDA, the chatbot he’d been testing, was sentient. Artificial intelligence (AI) systems, especially so-called large language models such as LaMDA and ChatGPT, can certainly seem conscious. But they’re trained on vast amounts of text to imitate human responses. So how can we really know?