I have always thought of ML (not DL) as phenomena that can be modelled mathematically.
It turns out that not all problems have a great mathematical model like self driving cars for instance and so the search continues...
It turns out that not all problems have a great mathematical model like self driving cars for instance and so the search continues...
Or do you mean that the models are either black boxes (like deep learning) that we don't understand, and the white box models are not good enough?