I watched an Andrej Karpathy video recently. He said that hallucination was because in the training data there were no examples where the answer is, "I don't k

I watched an Andrej Karpathy video recently. He said that hallucination was because in the training data there were no examples where the answer is, "I don't know". Maybe I'm misinterpreting what he was saying though. https://www.youtube.com/watch?v=7xTGNNLPyMI&t=4832s https://www.youtube.com/watch?v=7xTGNNLPyMI&t=4832s