> A system with superhuman capabilities cannot make basic mistakes consistently
That sounds like a definition you just made up to fit your story. A system can both make bigger leaps in a field where the smartest human is unfamiliar and make dumber mistakes than a 10 year old. I can say that confidently, because we have such systems. We call them LLMs.
It's like claiming that it can't both be sunny and rainy. Nevertheless, it happens.