内容摘要：But the company concluded that despite "concerning behaviour in Claude Opus 4 along many dimensions," these did not represent fresh risks and it would generally behave in a safe way.

But the company concluded that despite "concerning behaviour in Claude Opus 4 along many dimensions," these did not represent fresh risks and it would generally behave in a safe way.

Luke, who is now 31 and back to full health, feels he can put the last 15 years behind him. He has even run a marathon."Meeting Alastair in person is a dream come true," he says. "What do you say to the person who has given you your life back by literally giving a part of themselves?

"Me being able to get on that plane and fly across the world is possible only because of him."The moment I got to give him that huge hug and thank him in person is a moment I'll never forget."Alastair, now 51, hopes their story will encourage others to sign up to the stem cell registry.

"Meeting Luke today really brings home just what a difference that simple act can make," he says."I just wish more people would put themselves forward to be on the register to donate, whether it's platelets or organs or blood or stem cells – that is just the gift of life.

"There's nothing that makes you feel more complete as a human being – and when it's a success story, like it clearly has been in our case, it makes everything all worthwhile."

Four people have died and several were missing as major flooding in New South Wales (NSW) left about 50,000 people isolated by floodwaters.The idea of machines with their own minds has long been explored in science fiction. Worries about AI stretch back nearly a hundred years to the film Metropolis, in which a robot impersonates a real woman.

A fear of machines becoming conscious and posing a threat to humans is explored in the 1968 film 2001: A Space Odyssey, when the HAL 9000 computer attacks astronauts onboard its spaceship. And in the final Mission Impossible film, which has just been released, the world is threatened by a powerful rogue AI, described by one character as a "self-aware, self-learning, truth-eating digital parasite".But quite recently, in the real world there has been a rapid tipping point in thinking on machine consciousness, where credible voices have become concerned that this is no longer the stuff of science fiction.

The sudden shift has been prompted by the success of so-called large language models (LLMs), which can be accessed through apps on our phones such as Gemini and Chat GPT. The ability of the latest generation of LLMs to have plausible, free-flowing conversations has surprised even their designers and some of the leading experts in the field.There is a growing view among some thinkers that as AI becomes even more intelligent, the lights will suddenly turn on inside the machines and they will become conscious.