I think determinism is an important element. You can ask the same LLM the same question repeatedly and get different answers - and not just different ways of stating the same answer, very different answers.
If you ask an intelligent being the same question they may occasionally change the precise words they use but their answer will be the same over and over.
If you ask an intelligent being the same question they may occasionally change the precise words they use but their answer will be the same over and over.