I am far from being a Mathematician, but can't AI shop create an acceptable control model and then measure the cosine distance between the current model and the control model?

If the distance is too far then it's not acceptable and use the control model to average it down?

Also, isn't this similar technique as managing hallucination? (If you have an acceptable control/baseline)

Then again, I am not a Mathmetician so I don't know the details.