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For four decades, a controversial idea has shaped how autism is understood by researchers, healthcare professionals and the public: the claim that autistic people are “mind blind”. The phrase suggests an inability to grasp what others think or feel. It is simple, memorable – and wrong.

The claim rests on a concept called “theory of mind”. In everyday terms, theory of mind is the ability to recognise that other people’s thoughts, beliefs and emotions may differ from your own. This idea explains why someone understands that a joke can fall flat, that a promise can be broken, or that a friend can be mistaken without lying. It is often presented as the key to how people make sense of one another.

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The gut bacterium Bacteroides fragilis has long presented researchers with a paradox. It has been associated with colorectal cancer, yet it also lives quite happily in most healthy people. A new study from a Danish research team offers a possible clue. When they looked beyond the bacterium itself and into its genome, they found a previously unknown virus embedded within it – one that was significantly more common in cancer patients.

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By this time 25 years ago, the "Dot-Com Bubble" was ready to burst. People who wanted to raise investor money claimed that they could sell anything affordably on a website; three companies were devoted just to pet food and buying ad space on broadcast television.

So-called AI is enjoying a similar frenzy. Though they are still just Large Language Models (LLMs), and the best analogy for that is a fancy autocomplete, they are attracting huge levels of financial investment partly because of the potential and then primarily because people want to make money on stocks, not companies.

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